What happens to the the eardrum, a thin membrane at the end of the ear canal, when it is struck by a sound wave?
a) It vibrates.
b) It closes.
c) It rotates.
d) It inverts.
g an optical fiber uses flint glass surrounded by a crown glass cladding. for convenience, the index of refraction for a variety of materials is provided below. what is the critical angle, in degrees, for total internal reflection?
Optical fiber is a type of cable that can be used to transmit data as light signals. It is made up of thin glass or plastic fibers that are bundled together to create a pathway for light to travel.
The refractive index of a material is the ratio of the speed of light in a vacuum to the speed of light in that material. It's a dimensionless number that's always greater than or equal to Critical angle
Critical angle is the smallest angle of incidence that allows total internal reflection to occur when light is traveling from a more dense medium to a less dense medium.
It is given by θc = sin⁻¹(n₂/n₁).
Explanation
When the refractive index of a material increases, the critical angle decreases.
Step 1: Let n1 be the refractive index of the fiber and n2 be the refractive index of the cladding.
Step 2: The critical angle θc is given by θc = sin⁻¹(n₂/n₁).
Step 3: Substitute the values to get θc = sin⁻¹(1.53/1.66) = 64.26°.
Therefore, the critical angle, in degrees, for total internal reflection is 64.26°.
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Can some one Explain to me how the orbits of the planets around the sun work?
Kepler 2nd and 3rd law are tricky can someone explain?
Since the powerful gravitational pull of the Sun, all of the the solar system's planets revolve around it. The Sun basically attracts the solar system's planets, encompassing Earth, as well as allows them to be in orbit.
What is Kepler's law?Kepler's laws of planetary motion was initially published at 1609 and 1619 by Johannes Kepler which implies the description of the main orbits of planets around the Sun.
They explain the following scenarios:
Planets move in elliptical orbits all around the Sun.A planet grab the similar quantity of space in the similar time not relating of the place it is in its orbit.A planet's orbital period is usually proportional to the size of its orbit.Thus, this way, the orbits of the planets around the sun work.
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if a test charge of magnitude twice as large as the original test charge were placed at point a, how would the force it feels compare to the force felt by the original test charge when it was placed at point a?
The force felt by the larger test charge would be twice as large as the force felt by the original test charge.
This is because the force felt by a test charge in an electric field is directly proportional to the magnitude of the test charge. The electric field is a vector field and the force experienced by a test charge is given by the product of the charge of the test particle and the electric field at that point.
So, when the magnitude of the test charge is doubled, the force experienced is also doubled. Therefore, if a test charge of magnitude twice as large as the original test charge were placed at point a, it would feel twice the force that the original test charge felt when it was placed at that same point.
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Un movil avanza a 20 m/s y recorre una distancia de 800 km. Determinar el tiempo en horas que utiliza
Answer:
t = 11.1 hours
Explanation:
The question says that, "A mobile advances at 20 m / s and travels a distance of 800 km. Determine the time in hours you use".
Given that,
Speed of a mobile, v = 20 m/s = 72 km/h
Distance, d = 800 km
We know that,
Speed = distance/time
So,
\(t=\dfrac{d}{v}\\\\t=\dfrac{800}{72}\\\\t=11.1\ h\)
So, it will take 11.1 hours.
1. chemistry the study of matter and energy and how they interact 2. physics the systematic study and analysis of facts 3. science a process to test a proposed solution to a problem 4. scientific method the study of the structure, properties, and interactions of materials and the changes they undergo
Answer:
1. Chemistry- the study of the structure, properties, and interactions of materials and the changes they undergo.
2. Physics- the study of matter and energy and how they interact.
3. Science- the systematic study and analysis of facts.
4. Scientific method- a process to test a proposed solution to a problem.
Explanation:
1. Chemistry is a branch of science that deals with the study of the structures, properties, and interactions of various materials with other materials. It also includes the study of such changes that may occur during such interactions.
2. Physics is also one branch of science that deals with the study of matter and energy. Contrary to chemistry, this scientific branch deals with the interaction of matter and energy, their motion, and behavior especially related to space and time.
3. Science is the systemic study and analysis of facts. It is the understanding of the natural and scientific world, dealing with the elements of how and why things work.
4. Scientific method is the method or process by which tests are made to ascertain problems and find a solution for such. It is the method of getting knowledge and solutions, the experimentation to get to a conclusive result.
A diving pool that is 7 m deep and full of water has a viewing window on one of it's vertical walls. Find the force on a square window, 2 m on a side, with the lower edge of the window on the bottom of the pool.
The force on the square window, with the lower edge on the bottom of the pool, is approximately 274,400 Newtons.
The density of water (ρ) is approximately 1000 kg/m³ and the acceleration due to gravity (g) is approximately 9.8 m/s². Plugging in these values, we have:
P = (1000 kg/m³) * (9.8 m/s²) * (7 m)
P = 68,600 Pa (or N/m²)
Now, to find the force exerted on the window, we need to multiply the pressure by the area of the window. Since the window is square and its side length is 2 m, the area is:
A = L²
A = (2 m)²
A = 4 m²
Finally, we can calculate the force on the window:
Force = Pressure * Area
Force = 68,600 Pa * 4 m²
Force = 274,400 N
Force is a fundamental concept in physics that describes the interaction between objects and influences their motion. It is a vector quantity, meaning it has both magnitude and direction. When a force is applied to an object, it can cause a change in its velocity, shape, or state of rest. According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass.
Forces can be categorized into several types, such as gravitational, electromagnetic, frictional, and normal forces. Gravitational force is the attraction between two objects with mass, while electromagnetic force involves the interaction of electric charges or magnetic fields. Frictional force opposes the motion of objects in contact, and normal force is the support force exerted by a surface.
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A child sitting 1.20 m from the center of a merry-go-round moves with a speed of 1.30 m/s.
(a) Calculate the centripetal acceleration of the child.
(b) Calculate the net horizontal force exerted on the child (mass = 25.0 kg).
Calculate the centripetal acceleration of the child. Centripetal acceleration is the acceleration that occurs when a body moves in a circular path and it is always directed towards the center.
We can use the formula for centripetal acceleration which is: a = v²/r where: a is the centripetal acceleration v is the velocity of the body r is the radius of the circular path In this problem, the child has a velocity of 1.3 m/s and is moving in a circular path with a radius of 1.2 m. Thus, the centripetal acceleration of the child can be calculated as: a = v²/r = (1.3 m/s)²/1.2 m = 1.41 m/s²Therefore, the centripetal acceleration of the child is 1.41 m/s².b) Calculate the net horizontal force exerted on the child (mass = 25.0 kg).The net horizontal force exerted on the child can be calculated using the formula: F = ma where: F is the net force acting on the body m is the mass of the body a is the acceleration of the body The child has a mass of 25.0 kg and is experiencing a centripetal acceleration of 1.41 m/s². Therefore, the net force exerted on the child can be calculated as: F = ma = (25.0 kg)(1.41 m/s²) = 35.3 N Therefore, the net horizontal force exerted on the child is 35.3 N. In the above problem, we were asked to calculate the centripetal acceleration of a child who is sitting on a merry-go-round and moves with a speed of 1.30 m/s. We were also asked to calculate the net horizontal force exerted on the child who has a mass of 25.0 kg. To solve this problem, we used the formula for centripetal acceleration and the formula for force. Using the formula for centripetal acceleration, we calculated that the child has a centripetal acceleration of 1.41 m/s². This means that the child is experiencing an acceleration that is directed towards the center of the merry-go-round and is responsible for keeping the child in a circular path.Using the formula for force, we calculated that the net horizontal force exerted on the child is 35.3 N. This means that there is a force acting on the child in the horizontal direction that is responsible for producing the centripetal acceleration.
In conclusion, the child on the merry-go-round has a centripetal acceleration of 1.41 m/s² and is experiencing a net horizontal force of 35.3 N. These calculations help us understand the forces acting on a body in circular motion.
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the circuit in the drawing contains five identical resistors. the 45-v battery delivers 58 w of power to the circuit. what is the resistance r of each resistor?
The resistance R of each resistor is approximately 6.976 Ω.
To find the resistance R of each resistor in the circuit, first, we need to determine the total resistance in the circuit and the current flowing through it.
We can use the formula for power: P = V * I, where P is power, V is voltage, and I is current. Rearranging for I, we get:
I = P / V
I = 58 W / 45 V
I = 1.29 A
Now, we can use Ohm's Law, V = I * R, to find the total resistance in the circuit:
R_total = V / I
R_total = 45 V / 1.29 A
R_total = 34.88 Ω
Since there are five identical resistors in the circuit, we can find the resistance of each resistor by dividing the total resistance by 5:
R = R_total / 5
R = 34.88 Ω / 5
R = 6.976 Ω
Therefore, the resistance R of each resistor is approximately 6.976 Ω.
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4. Which of the three approaches to sociological investigation best fit the study: scientific
sociology, interpretive sociology, or critical sociology? Why? (4 points)
Scientific sociology is one of the three methods of sociological investigation that fits the topic the best.
The definition of scientific sociologyIt is possible to define sociology as the scientific study of society, which includes a complete analysis of both internal and external elements that can have an impact on social structures and interaction patterns.
It should be noted that while the sociology field is very broad and full of opportunities that are required to complete the study that is being discussed in the work, this study focuses on social interaction and culture, which help to determine the things that can be used to learn more about the society.
In conclusion, of the three methods of sociological inquiry, scientific sociology is the most effective for the study of society.
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how do hydrogen atoms become ionized within an h-ii region? question 19 options: as a result of emitting radiation within the visible light spectrum by absorbing ultraviolet radiation from a nearby star by absorbing radiation within the visible spectrum by capturing the free electrons within the cloud by absorbing thermal radiation from the nearby star
Within an H-II region, hydrogen atoms become ionized by absorbing ultraviolet radiation from a nearby star.
The high-energy photons from the star have enough energy to knock an electron off the hydrogen atom, leaving a positively charged hydrogen ion or proton.
This process is known as photoionization and is the main mechanism for ionizing hydrogen in H-II regions.
The ionized hydrogen then emits its own radiation, creating the characteristic red glow of H-II regions.
While hydrogen atoms can also become ionized by other means, such as absorbing thermal radiation or capturing free electrons, these processes are less common in H-II regions compared to photoionization by ultraviolet radiation from nearby stars.
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Multiple Choice
Which of the following is not an example of malicious code?
A Trojan horse
B worm
C virus
D. spy gear
Answer:
D
Explanation:
Spy gear is different from Spyware.
a 2.50 kg blocl is pushed 2.20 m along a horizontal table by a constant force of 16.0 n directed at 25 degrees below the horizontal . if the coefficient of kinetic friction between the block ans the table is 0.213, what is the work done by the frictional force
To find the work done by the frictional force, we first need to calculate the net force acting on the block. Therefore, the work done by the frictional force is approximately 11.482 Joules.
The horizontal component of the applied force can be calculated as follows:
F\(_{horizontal }\) = F\(_{applied}\) × cos(25°)
F\(_{horizontal }\) = 16.0 N × cos(25°)
F\(_{horizontal }\) ≈ 14.495 N
Next, we need to calculate the force of kinetic friction:
F\(_{friction}\) = coefficient of kinetic friction × normal force
The normal force can be calculated as the weight of the block:
Normal force = mass × gravitational acceleration
Normal force = 2.50 kg × 9.8 m/s²
Normal force ≈ 24.5 N
Now, we can calculate the force of kinetic friction:
F\(_{friction}\) = 0.213 × 24.5 N
F\(_{friction}\) ≈ 5.219 N
Since the block is being pushed horizontally, the work done by the frictional force is given by:
Work\(_{friction}\) = F\(_{friction}\) × displacement
Work\(_{friction}\) = 5.219 N × 2.20 m
Work\(_{friction}\) ≈ 11.482 J
Therefore, the work done by the frictional force is approximately 11.482 Joules.
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In winter the air just above the top bunk of a bunk bed is warmer than the air just above the bottom bunk because warm air rises. Which of the following describes the method of heating that causes this difference in temperature?
Answer:
the heating method in here is conventional heating due to the warn air goes to the top bunk whereas the cold air sinks down
The waves that heat a cup of water in the microwave are an example of electromagnetic waves. True or False
That's true.
They're radio waves, at the frequency of 2.45 GHz (in all microwave appliances manufactured in the US).
how much work is done by the force f⃗ =( 9.00 i^− 1.10 j^)n on a particle that moves through displacement (a) δr⃗ = 2.50 i^m and (b) δr⃗ = 2.50 j^m?
The work done by a force F on a particle moving through a displacement δr is given by the dot product of the force and displacement vectors: W = F·δr.
For the displacement vector δr⃗ = 2.50 i^m, the work done by the force f⃗ = (9.00 i^− 1.10 j^) N is:
W = f⃗ ·δr⃗ = (9.00 i^− 1.10 j^) N · 2.50 i^m
= 22.5 N·m
For the displacement vector δr⃗ = 2.50 j^m, the work done by the force f⃗ = (9.00 i^− 1.10 j^) N is:
W = f⃗ ·δr⃗ = (9.00 i^− 1.10 j^) N · 2.50 j^m
= -2.75 N·m
Note that the negative sign in part (b) indicates that the force and displacement vectors are in opposite directions, so the work done by the force is negative (i.e. the force does negative work).
To calculate the work done by a force on a particle, we use the formula W = F⃗ · δr⃗, where W is the work done, F⃗ is the force vector, and δr⃗ is the displacement vector.
Given F⃗ = (9.00 i^ - 1.10 j^) N and δr⃗ = 2.50 i^ m, we can calculate the work done as follows:
W = (9.00 i^ - 1.10 j^) · (2.50 i^) = (9.00 * 2.50) i^ + (-1.10 * 0) j^ = 22.5 J
Given F⃗ = (9.00 i^ - 1.10 j^) N and δr⃗ = 2.50 j^ m, we can calculate the work done as follows:
W = (9.00 i^ - 1.10 j^) · (2.50 j^) = (9.00 * 0) i^ + (-1.10 * 2.50) j^ = -2.75 J
So, the work done by the force for the given displacements are (a) 22.5 J and (b) -2.75 J.
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Please round 1045.2 to three significant digits
Answer:
1040
Explanation:
The rules for significant digits is that non-zero digits are significant figures. The zero in between 1 and 4 is significant because any zeroes between two significant digits are significant. Trailing zeroes if there is no decimal point are insignificant.
The number 1045.2 rounded to three significant digits would be 1040 because the rightmost zero is not a significant digit.
What are significant figures?In positional notation, significant figures refer to the digits in a number that is trustworthy and required to denote the amount of something, also known as the significant digits, precision, or resolution.
The definition of a significant digit according to the criteria is a non-zero digit. Any zeroes between two significant digits, such as the one between 1 and 4, are noteworthy. In the absence of a decimal point, trailing zeroes are not relevant.
According to the criteria for significant digits, non-zero digits are important numbers. The zero between 1 and 4 is crucial, as is any zero between two significant digits. The trailing zeroes are irrelevant if there is no decimal point.
Thus, the number 1045.2 rounded to three significant digits would be 1040.
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What type of energy is described above? A. sound energy B. light energy C. heat energy D. kinetic energy
Kinetic energy is the kind of energy mentioned. The energy an object has as a result of its motion is known as kinetic energy.
What kind of energy are light and sound?Sound is a pressure density wave, whereas light is an electromagnetic wave. Sound must pass through a medium in order to be heard, but light does not. Sound energy is a continuous stream of energy on the scale while light energy is quantized into packets of energy called photons.
Why is energy in the form of sound?Sound is the longitudinal (compression or rarefaction) wave-based transfer of energy through materials. When a force causes an object or substance to vibrate, sound is created. That is to say, the substance serves as a conduit for the energy.
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The type of energy mentioned is kinetic energy. Kinetic energy is the energy that an object has as a result of motion.
Light and sound both include what kind of energy?Light is an electromagnetic wave, whereas sound is a pressure density wave. Light does not require a medium for transmission, but sound must. On the scale, sound energy flows continuously, whereas light energy is quantized into units of energy called photons.
What causes energy to manifest as sound?The longitudinal wave-based transport of energy through materials is known as sound. Sound is produced when a force causes an item or substance to vibrate. In other words, the substance acts as a conduit.
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____________ energy the energy of motion, observable as the movement of an object or subatomic particle. Every moving object and particle have this energy. A person walking, a soaring baseball, a crumb falling from a table and a charged particle in an electric field are all examples of this energy at work.
What type of energy is described above? A. sound energy B. light energy C. heat energy D. kinetic energy
rock layers can shift due to:
A. Volcano eruptions
B:Earthquakes
C. Tectonic Plate Movement
Answer:
c
Explanation:
Lamp Sensor2 Lamp 1 1 1 1 1 1 1 I I 1 1 5s I 1 1 1 T 1 1 1 I | 1 T 1 V. Program design (25 points) I I 1 T 1 1 1 I 1 158.1 1 I Use a PLC to control a lamp. There is a sensor to detect approaching objects, then the lamp will be lit up for a while, and then it will turn off automatically. The sequence diagram of this application is shown left. Please finish the complete design (include the circuit design and program design).
A programmable logic controller (PLC) is used to control the lamp according to the given requirements. PLC is a type of microcontroller that is used to control industrial processes. PLCs can control both analog and digital signals and are used to automate machinery. PLCs are preferred in industrial environments because they are reliable and provide precise control of the machinery.
Circuit Design:
Start by selecting a suitable PLC that supports digital input and output modules. PLCs from different manufacturers may have slightly different hardware configurations, so refer to the specific PLC's user manual for detailed information on wiring and module selection.Connect the sensor to one of the digital input modules of the PLC. The sensor will detect approaching objects and provide an input signal to the PLC.Connect the lamp to one of the digital output modules of the PLC. This output will control the lamp's state, turning it on or off.Ensure proper power supply connections for both the PLC and the lamp. Follow the manufacturer's guidelines to provide appropriate power to the PLC and the connected devices.Let's learn more about PLC:
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A helicopter flies 165m horizontally and then moves downward 45m below. What is the helicopter's resultant displacement
The helicopter flies 165m horizontally and then moves downward 45m below so ,the helicopter's resultant displacement is 171 m.
What is resultant displacement ?
Resultant displacement is defined as the the shortest distance from initial point of movement to the final point of movement.
What is Pythagoras theorem ?
Pythagoras theorem is defined for a right angled triangle as the square of the hypotonus being equal to sum of square of base and square of perpendicular.
given :
helicopter flies horizontally a displacement (x) = 165m
helicopter flies vertically a displacement (y)= 45m
the above condition can be imagined in a 2-D graph or plane with x and y axis
and since the curve will be a sharp 90° the resultant figure is of a right angled triangle.
therefore,
using Pythagoras theorem we get;
( resultant displacement )²= (165)² + (45)²
( resultant displacement ) = 171 m
The helicopter flies 165m horizontally and then moves downward 45m below so ,the helicopter's resultant displacement is 171 m.
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Gravitational force between two masses m, and m, is represented as F Gm₂ m₂ 7 where = xi+yj + zk and Irl=√√x² + y² + z² G,m,, m₂ are nonzero constants and let's assume that I 0 a) Calculate curl of and divergence of F (4 points) b) Show the integral ffdf is path independent and calculate following (4 points) (11) 우리가 일반물리 시간에 중력장을 이용한 포텐셜은 위치의 함수라는 걸 배운게 기억이 날겁니다. 이 문제는 사실 vector function 에 대한 문제인데 (9.10.11 단원), 우리가 배운 수학적 도구를 가지고 한번쯤 생각해볼 필요가 있어서 넣었습니다.
Gravitational force between two masses m, and m, is represented as F = Gm₂ m₂ / r^2 where r = xi+yj + zkG, m, m₂ are nonzero constants and let's assume that I = 0
a) Calculation:For F = Gm₂ m₂ / r^2.
Using r = xi+yj + zk and let r^2 = x^2 + y^2 + z^2∴ F = Gm₂ m₂ / (x^2 + y^2 + z^2), Where G, m, m₂ are nonzero constants. Divergence of F = ∇ · F= 1/r^2(d/dx(r^2Fx) + d/dy(r^2Fy) + d/dz(r^2Fz))= 1/r^2(d/dx(r^2Gm₂ m₂ x/(x^2+y^2+z^2)^(3/2)) + d/dy(r^2Gm₂ m₂ y/(x^2+y^2+z^2)^(3/2)) + d/dz(r^2Gm₂ m₂ z/(x^2+y^2+z^2)^(3/2)))= 1/r^2(d/dx(r^2Gm₂ m₂ x/(x^2+y^2+z^2)) * (x^2+y^2+z^2)^(3/2) + d/dy(r^2Gm₂ m₂ y/(x^2+y^2+z^2)) * (x^2+y^2+z^2)^(3/2) + d/dz(r^2Gm₂ m₂ z/(x^2+y^2+z^2)) * (x^2+y^2+z^2)^(3/2))= 1/r^2(Gm₂ m₂ [2x(x^2+y^2+z^2)-3x^2]/(x^2+y^2+z^2)^(5/2) + Gm₂ m₂ [2y(x^2+y^2+z^2)-3y^2]/(x^2+y^2+z^2)^(5/2) + Gm₂ m₂ [2z(x^2+y^2+z^2)-3z^2]/(x^2+y^2+z^2)^(5/2))= 1/r^2(Gm₂ m₂ [(2x^2+2y^2+2z^2-3x^2)/(x^2+y^2+z^2)^(3/2)] + [2x^2+2y^2+2z^2-3y^2]/(x^2+y^2+z^2)^(3/2)] + [2x^2+2y^2+2z^2-3z^2]/(x^2+y^2+z^2)^(3/2)])= 1/r^2(Gm₂ m₂ [x^2+y^2+z^2]/(x^2+y^2+z^2)^(3/2))= 0.
Curl of F = ∇ × F= i(d/dy(Fz) - d/dz(Fy)) - j(d/dx(Fz) - d/dz(Fx)) + k(d/dx(Fy) - d/dy(Fx))= i(d/dy(Gm₂ m₂ z/(x^2+y^2+z^2)) - d/dz(Gm₂ m₂ y/(x^2+y^2+z^2))) - j(d/dx(Gm₂ m₂ z/(x^2+y^2+z^2)) - d/dz(Gm₂ m₂ x/(x^2+y^2+z^2))) + k(d/dx(Gm₂ m₂ y/(x^2+y^2+z^2)) - d/dy(Gm₂ m₂ x/(x^2+y^2+z^2)))= i(Gm₂ m₂ [-2xz]/(x^2+y^2+z^2)^(5/2)) - j(Gm₂ m₂ [-2yz]/(x^2+y^2+z^2)^(5/2)) + k(Gm₂ m₂ [(x^2+y^2-2z^2)]/(x^2+y^2+z^2)^(5/2))
b) Calculation:The line integral of F along a curve C can be evaluated by the following formula∫C F.dr = ∫∫ ( ∇ x F) ds, Where r is the position vector of the curve, s is the scalar parameter representing the curve, and the integral is evaluated from the initial point to the final point.
Using the curl of F obtained in part a) and for the surface with ∂S as C∫C F.dr = ∫∫ ( ∇ x F) ds= ∫∫ curl(F) ds= ∫∫ (-2xz i -2yz j + (x^2+y^2-2z^2)k) ds...[1]
Let's consider the surface S as a plane perpendicular to the z-axis of the form ax+by+c=0 and the curve C as the intersection of the plane and the cylinder x^2 + y^2 = a^2.
Let's choose the unit normal to the surface S as k (along the z-axis).
The curl of F is a vector field perpendicular to the plane and along the direction of k.
Thus the integral can be written as∫C F.dr = ∫∫ ( ∇ x F) . k ds= ∫∫ (x^2+y^2-2z^2) ds...[2]
Now let's evaluate the integral over the given plane ax+by+c=0. We can write x = t, y = (c-at)/b and z = 0, where t is the scalar parameter along the line of intersection of the plane and the cylinder (x^2 + y^2 = a^2).
Since the curve C is on the cylinder of radius a, we have x^2+y^2 = a^2 ⇒ t^2+(c-at)^2/b^2 = a^2On solving for t, we have t = (bc±ab √(a^2-b^2-c^2))/[a^2+b^2].
Substituting t in x and y, we get the curve C in the x-y plane as a function of the scalar parameter s asx = (bc±ab √(a^2-b^2-c^2))/[a^2+b^2]y = (c-at)/b= (c-(bc±ab √(a^2-b^2-c^2))/[a^2+b^2])/b.
Now we can evaluate the integral over the curve C, which is along the intersection of the plane and the cylinder.
Integral over C (x^2+y^2-2z^2) ds= ∫t₁^t₂ [(t^2 + [(c-at)^2]/b^2 - 2(0)^2)^(1/2)] dt= ∫t₁^t₂ [(a^2-b^2-c^2)t^2+2bc(c-at)+b^2c^2-a^2b^2]^(1/2) dt.
Now we can choose the value of t₁ and t₂ such that the square root in the integrand is minimized (so that the integral is path-independent).
This can be done by choosing the value of t that gives the minimum value of (a^2-b^2-c^2)t^2+2bc(c-at)+b^2c^2-a^2b^2 over the range of t from t₁ to t₂.
On differentiation with respect to t and equating to 0, we get the value of t = bc/(a^2+b^2).
Substituting this value of t in the integrand, we get the minimum value of the square root in the integrand to be |c| √(a^2+b^2)/|b|.
Thus the integral over C is given by∫C F.dr = ∫∫ (-2xz i -2yz j + (x^2+y^2-2z^2)k) ds= ∫∫ (x^2+y^2-2z^2) ds= ∫t₁^t₂ |c| √(a^2+b^2)/|b| dt= |c| √(a^2+b^2)/|b| (t₂-t₁).
Now we can see that the integral is path-independent as it depends only on the end points t₁ and t₂ and not on the path taken to reach them.
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whats the order of solid liquid and gas from least particle motion to the most?
Answer:
Solid < Liquid < Gas
Sorry if it’s blurry. Please help. I can’t mess up.
answer:
MAXIMUM SPEED
explanation:
IM SURE THAT IS THE ANSWER
After our sun leaves the main sequence it will most likely
A.) become a supergiant and explode in a supernova explosion
B.) become a giant and eventually form a black hole
C.) become a supergiant and eventually form a dwarf star
D.) become a giant and eventually form a dwarf star
The current i flowing in an LR circuit is given by the formula
i=VR(1−e−RtL)
where V, R, and L are constants and t is the time.
Given the following values:
V=40,R=80,L=18
what is the terminal value of the current (i.e. the value at infinite time)?
As per the given data the terminal value of the current in the LR circuit is 3200 amps.
To find the terminal value of the current in the LR circuit, we can analyze the behavior of the equation as time (t) approaches infinity.
The formula for the current in the LR circuit is given by:
\(i = VR(1 - e^(^-^R^t^/^L^))\)
In the equation, as t approaches infinity, the term e^(-Rt/L) approaches zero, since the exponential function decreases rapidly as t increases.
So, when t approaches infinity, the equation simplifies to:
\(i = VR(1 - 0)\\i = VR\)
Substituting the given values V = 40 and R = 80 into the equation, we get:
\(i = 40 * 80\\i = 3200\)
Therefore, the terminal value of the current in the LR circuit is 3200 amps.
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The Sun has a radius of
695,500 km. What is the radius of
Sirius in km?
The radius of Sirius is approximately 1,191,825.5 km.
The radius of Sirius is approximately 1.711 times the radius of the Sun. To find the radius of Sirius, we can multiply the radius of the Sun by this factor.
Sirius is a binary star system consisting of two stars: Sirius A and Sirius B. Sirius A is the brighter and larger star, comparable to the Sun. While the exact radius of Sirius A is not known with certainty, it is estimated to be around 1.71 times larger than the Sun's radius. Given the Sun's radius of 695,500 km, we can calculate that the radius of Sirius A is approximately 1,190,055 km. It is important to note that this value is an approximation and may vary depending on the source and specific measurements.
Radius of Sirius = 1.711 * Radius of the Sun
Radius of Sirius = 1.711 * 695,500 km
Radius of Sirius ≈ 1,191,825.5 km
Therefore, the radius of Sirius is approximately 1,191,825.5 km.
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why do you think there is a difference between your experimental value and the value on the bottle? which value do you think is the most accurate: yours or the one on the bottle? why?
The difference between the experimental value and the value on the bottle could be due to several factors. It is possible that the measuring instrument used during the experiment was not calibrated correctly or had some inherent error, leading to a discrepancy in the value obtained.
Additionally, factors such as human error, environmental conditions, and variability in the sample being tested could also contribute to the difference observed.
Determining which value is the most accurate would require further investigation. It is possible that the value on the bottle was obtained through a different method or under different conditions than the experimental measurement. In general, however, it is recommended to consider the experimental value as the most accurate, as it is based on direct measurement and is specific to the conditions and materials used in the experiment.
Ultimately, it is important to consider the accuracy and precision of any measurement, as well as any potential sources of error, in order to determine the most accurate value possible.
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A sub marine is 40cm below seawater of density 1020kg/m3.If the atmospheric pressure at the place is 103,000pa,calculate the total pressure acting on the submarinea .
The total pressure acting on the submarine is approximately 106,993.6 Pa.
To calculate the total pressure acting on the submarine, we need to consider both the pressure due to the depth of the seawater and the atmospheric pressure.
The pressure due to the depth of the seawater can be calculated using the formula:
Pressure = density × gravity × depth
where density is the density of the seawater, gravity is the acceleration due to gravity, and depth is the depth of the submarine below the seawater.
Given:
Density of seawater = 1020 kg/m³
Depth of submarine below seawater = 40 cm = 0.4 m
Acceleration due to gravity = 9.8 m/s²
Pressure due to the depth of the seawater = 1020 kg/m³ × 9.8 m/s² × 0.4 m = 3993.6 Pa
Next, we need to consider the atmospheric pressure, which is given as 103,000 Pa.
To find the total pressure acting on the submarine, we need to add the pressure due to the depth of the seawater to the atmospheric pressure:
Total pressure = Atmospheric pressure + Pressure due to depth of seawaterTotal pressure = 103,000 Pa + 3,993.6 Pa
Therefore, the total pressure acting on the submarine is approximately 106,993.6 Pa.
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assume an inductor is connected to a 180-v ac line and the inductor has an induced voltage of 120 v. how many volts are there to push current through the wire resistance of the coil?
Assuming an inductor is connected to a 180-v ac line and the inductor has an induced voltage of 120 v, there are 60 volts available to push the current through the wire resistance of the coil.
To determine the voltage that pushes the current through the wire resistance of the coil, you'll need to consider the voltage across the inductor and the applied voltage from the AC line. Given that the induced voltage across the inductor is 120 V and the AC line voltage is 180 V, you can calculate the voltage across the wire resistance by using the formula:
Voltage across wire resistance = AC line voltage - Induced voltage across the inductor
Voltage across wire resistance = 180 V - 120 V = 60 V
So, there are 60 volts available to push the current through the wire resistance of the coil.
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