two vectors have magnitudes 3 m and 4 m. their resultant has a magnitude of 1 m. the angle between the two vectors must be:
Answers
The angle between two vectors is found using the dot product of the vectors, so the angle between two vectors must be 90°
According to the question, two vectors of magnitudes 3 m and 4 m are given.
These two vectors' resultant has a magnitude of 1 m.
The angle between two vectors is calculated by using the dot product of the two vectors and dividing it by the product of the magnitudes of the two vectors.
Hence, the angle between the two vectors must be:cosθ= A . B/ |A||B| where A and B are the two given vectors.
Thus, the angle between two vectors is given bycosθ =1/ (3 × 4)cosθ = 1/12θ = cos−1(1/12)θ ≈ 84.3°Thus, the angle between two vectors is approximately 84.3°
Summary: Thus, the angle between two vectors is approximately 84.3°.
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Related Questions
15 POINTS URGENT DUE IN 5 MINUTES :(
please don’t troll.
A. A woman hiked on a trail up a mountainShe slowed down as it became more steep. She stopped at the top to take in the view below. Then she continued on the trail and walked down the other side of the mountain.
B. A truck driver left a warehouse and drove on a highway at a constant speed before he stopped for lunch. To make up for lost time, he drove faster when he got back on the highway. He unloaded his haul and drove quickly back to the warehouse.
C. A woman drove her car up steep bill and stopped at a red lightWhen the light turned green she continued to drive up the rest of the hill until she reached the gas station. She stopped to buy gas and then drove down the other side of the hill towards her office.
D. A man ran in a race and accelerated steadily for the first hour. He then continued briefly at a constant pace while he had the lead. When other runners began to catch up he accelerated againHe then continued at a constant high speed. He became overtired and slowed down until he had to completely stop running.
Answers
Answer:
D now go to ur good life :)
Explanation:
Answer:
blah
Explanation:
blah
Which color of visible light has a LOWER FREQUENCY than orange light?
A. Green
B. Red
O C. Blue
D. Violet
Answers
Answer:
B. Red
Step by step explanation:
Answer:
Explanation:
Green Blue and Violet are all above Orange.
Only red is below it.
Here are the colors and their frequencies.
Color Frequency * 10^14
Red 4.62
Orange 5.00
Green 5.45
Blue 6.66
Violet 7.50
An oil tank has a base of area 2.5 m2 and is filled with oil to a depth of 1.2 m. The density of the
oil is 800 kg/m3. What is the force exerted on the base of the tank due to the oil?
A. 960N
B. 2400N
C. 9600N
D. 24 000N
Answers
Answer:
D. F = 24000[N]
Explanation:
To be able to calculate the force we must first find the pressure at the bottom of the tank. By means of the following equation:
\(P=Ro*g*h\)
where:
Ro = density of the liquid = 800 [kg/m³]
g = gravity acceleration = 9.81 [m/s²]
h = elevation = 1.2 [m]
\(P=800*9.81*1.2\\P=9417.6[Pa]\)
Pressure is defined as the relationship between Force on the area.
\(P=F/A\\F=9417.6*2.5\\F = 23544 [N] = 24000[N]\)
If the intensity of light is caused by the light waves amplitude what causes the light waves colors?
Answers
The color of light is determined by its wavelength. When light waves pass through a prism, they are separated into their different wavelengths, creating a rainbow of colors.
Each color has a different wavelength, with red having the longest wavelength and violet having the shortest. The human eye is able to perceive these different wavelengths as different colors, allowing us to see the world in a spectrum of colors.
The intensity of light is indeed related to the amplitude of light waves, while the color of light is determined by the wavelength of these waves.
In summary, the color of light waves is caused by their wavelength. Different wavelengths of light correspond to different colors in the visible spectrum. Shorter wavelengths result in more energetic, bluer colors, while longer wavelengths produce less energetic, redder colors.
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what are some examples of the second law of motion
Answers
Noise cancelling headphones are a kind of headphones which decrease the amount of background noise that get into your ears when you wear them. On what physical phenomena do these headphones depend on?
Answers
The theory of destructive interference underlies the operation of noise-cancelling headphones.
The process of using passive and active noise control techniques to reduce undesired background and ambient noises is known as noise cancellation.
Active noise cancelling (ANC) adopts a different strategy from passive noise cancellation by "neutralising" incoming sound waves from your surroundings. Passive noise cancellation reduces ambient noise by erecting a "physical shield" to mask sound.
Small microphones built into ANC headphones send out sound waves that interfere with incoming sound waves from the environment, cancelling each other out. It's comparable to adding +3 and -3, where the result is zero (silence).
Both inside and outside the headphones' walls are picked up by the microphones.
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The breaking distance of a car is directly proportional to
its speed squared. A car takes 32m to stop when travelling at
12m/s. Calculate the breaking distance when travelling at
18m/s
Answers
Answer:
72 meters
Explanation:
Breaking distance is directly proportional to the speed squared.
d = k v²
When v = 12 m/s, d = 32 m.
32 = k (12)²
k = 2/9
d = 2/9 v²
When v = 18 m/s:
d = 2/9 (18)²
d = 72
a raindrop of mass 3.37 10-5 kg falls vertically at constant speed under the influence of gravity and air resistance. model the drop as a particle. (a) as it falls 60 m, what is the work done on the raindrop by the gravitational force? j (b) what is the work done on the raindrop by air resistance?
Answers
The work done on the raindrop by air resistance as it falls 60 m is approximately -0.0198 J.
What is force?
Force is a physical quantity that describes the interaction between two objects that can cause a change in the motion of one or both objects. Force can be defined as a push or a pull that can cause an object to move, stop moving, or change its direction of motion.
Force is measured in units of Newtons (N), named after Sir Isaac Newton, who is famous for his laws of motion. The magnitude of a force is determined by its effect on an object's acceleration. If a force of 1 N is applied to an object with a mass of 1 kg, it will result in an acceleration of 1 m/s².
According to given conditions :
(a) The work done on the raindrop by the gravitational force as it falls 60 m can be calculated using the formula:
W = mgh
where W is the work done, m is the mass of the raindrop, g is the acceleration due to gravity, and h is the distance fallen.
Substituting the given values, we get
\(W = (3.37 *10^-5 kg) (9.81 m/s^2) (60 m) ≈ 0.0196 J\)
Therefore, the work done on the raindrop by the gravitational force as it falls 60 m is approximately 0.0196 J.
(b) The work done on the raindrop by air resistance can be calculated using the formula:
W = Fd
where W is the work done, F is the force of air resistance, and d is the distance traveled.
The force of air resistance can be modeled as:
F = -kv
where k is a constant that depends on the properties of the air and the shape and size of the raindrop, and v is the velocity of the raindrop.
Since the raindrop is falling at a constant speed, the net force acting on it must be zero. Therefore, we have:
F_gravity + F_air = 0
where F_gravity is the force of gravity acting on the raindrop, and F_air is the force of air resistance.
Solving for F_air and substituting the known values, we get:
\(F_air = -F_gravity = -(m*g) = -(3.37 × 10^-5 kg) × (9.81 m/s^2) ≈ -0.00033 N\)
The negative sign indicates that the force of air resistance is opposite in direction to the motion of the raindrop.
Now, we can calculate the work done on the raindrop by air resistance as it falls 60 m:
W = F_air × d
where d = 60 m (the distance traveled).
Substituting the known values, we get:
W = (-0.00033 N) × (60 m) ≈ -0.0198 J
Therefore, the work done on the raindrop by air resistance as it falls 60 m is approximately -0.0198 J.
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state three uses of a magnet
Answers
Explanation:
Compass. A compass uses a magnet to direct its needle to the north pole
Magnets are used to make a tight seal on the doors to refrigerators and freezers. They power speakers in stereos, earphones, and televisions. Magnets are used to store data in computers, and are important in scanning machines called MRIs.
Answer:
Magnets are used to make a tight seal on the doors to refrigerators and freezers. They power speakers in stereos, earphones, and televisions. Magnets are used to store data in computers, and are important in scanning machines called MRIs (magnetic resonance imagers), which doctors use to look inside people's bodies.
Explanation:
what is the basic unit of mass in the international system of units
Answers
Answer:
kilogram (kg)
Explanation:
The energy released during the decay of one 56Co atom is 3.72 MeV. If 0.075M_{\odot}of 56Co was produced by the decay of 56Ni following the explosion of a supernova, estimate the amount of energy released per second through the radioactive decay of 56Co:
i) just after the formation of the cobalt;
ii) 80 days after explosion
iii) one year after the explosion
Answers
(I) Just after the formation of the cobalt = 7.03 × \(10^{40\) MeV/s
(II) 80 days after explosion = 3.06 × \(10^{40\) MeV/s
(iii) One year after the explosion 1.12 × \(10^{33\) MeV/s
The rate of energy released through the radioactive decay of 56Co is given by:
R = λNΔE
where λ is the decay constant, N is the number of radioactive nuclei, and ΔE is the energy released per decay.
The number of radioactive nuclei, N, can be calculated from the mass of 56Co produced, M, and its atomic mass, A, as follows:
N = (Avogadro's number * M) / A
where Avogadro's number is approximately 6.022 × \(10^{23\) \(mol^{-1.\)
i) Just after the formation of cobalt, all of the 56Co would be present and none of it would have decayed yet. Thus, the rate of energy released at this time would be:
R = λNΔE = λ (0.075 M ×6.022 × \(10^{23\)) / 56 × 3.72 MeV
= 7.03 × \(10^{40\) MeV/s
ii) 80 days after the explosion, some of the 56Co would have decayed. The number of remaining radioactive nuclei, N', can be calculated using the radioactive decay law:
N' = N \(e^(-λt)\)
where t is the time elapsed since the formation of 56Co. Using the half-life of 56Co, which is 77.27 days, we can calculate the decay constant:
λ = ln(2) /\(t_1/2\) = ln(2) / 77.27 days =\(e^(-8.97\)× 8.97 × \(10^{-3\) \(day^{-1\)
The time elapsed since the formation of 56Co, t, is 80 days. Thus, the number of remaining radioactive nuclei is:
N' = (0.075 M * 6.022 × \(10^{23\)) / \(e^(-8.97\)×56 × \(10^{-3\) \(day^{-1\) × 365 days)
= 0.026 M ×6.022 × \(10^{23\)
The rate of energy released at this time would be:
R = λN'ΔE = λ (0.026 M× 6.022 × \(10^{23\)) / 56 × 3.72 MeV
= 3.06 × \(10^{40\) MeV/s
iii) One year after the explosion, most of the 56Co would have decayed. Using the same approach as in part ii), we find that the number of remaining radioactive nuclei is:
N' = (0.075 M× 6.022 × \(10^{23\)) / 56 × \(e^(-8.97\) × \(10^{-3\) \(day^{-1\) × 365 days)
= 1.35 × \(10^{24\)
The rate of energy released at this time would be:
R = λN'ΔE = λ (1.35 × \(10^{24\)) ×3.72 MeV
= 1.12 × \(10^{33\) MeV/s
Note that the rate of energy released through the radioactive decay of 56Co decreases exponentially with time due to the decay of the radioactive nuclei.
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a support crossbeam on a high speed train is made from a titanium rod that has a length of 1.25 m when measured by an observer on the train. the beam is positioned such that the observer on the train measures an angle of 27 degrees between the crossbeam and the floor of the train. (figure 1) at what speed u would the train have to be traveling in order for an observer standing outside the train to measure the angle as 83 degrees ? in the figure, s indicates the reference frame of the observer standing outside the train and s' indicates the reference frame of the observer on the train.
Answers
0.765 m/s is speed u would the train have to be traveling in order for an observer .
R=1.25
Sinθ=27
speed=sinθ/r
speed=sin27/1.25
speed=0.765 m/s
A scalar variable called speed can be used to express how much the location of an object shifts over time or how much it shifts per unit of time. It is often shortened to "s." The average speed of an object over a period of time is equal to the distance traveled by the object divided by the length of the period.
Time divided by distance is the speed-related metric. While the SI unit of speed is the meter per second (m/s), the most common unit in daily life is the kilometer per hour (kph).
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if instead of water, we fill the semicircular disk with a liquid which has an index of refraction less than water, what will happen to the critical angle?
Answers
If instead of water, the semicircular disk is filled with a liquid which has an index of refraction less than water, the critical angle will be greater than that of water.
sin C = 1 / μ
C = Critical angle
μ = Refractive index
C ∝ 1 / μ
Critical angle is inversely proportional to Refractive index. As index of refraction decreases, the critical angle increases.
Critical angle is the value of incident angle when the incident ray and refracted ray are perpendicular to each other. The refractive index of water is 1.33. Refractive index has no unit.
Therefore, the critical angle will be greater than that of water.
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A circuit has a current of 3. 6 A and a resistance of 5. 0 Ω. What is the voltage applied to the circuit? 0. 72 V 1. 4 V 8. 6 V 18 V.
Answers
Answer:
18 V
Explanation:
According to Ohm's Law, current equals voltage divided by resistance. (I=V/R)
Using this, we can rearrange the equation to have it solved for voltage.
V=IR
Then, you plug in the values for the current and the resistance.
V=(3.6)x(5.0)
V=18
are unicorns real or not
Answers
Answer:
no lol
Explanation:
a numerical description of how far apart two objects are.
Answers
The distance between two objects is a numerical description of how far apart they are, and it is important to measure it accurately using the chosen unit of measurement.
A numerical description of how far apart two objects are is called the distance between them. The distance is typically measured in units such as meters, kilometers, miles, or any other unit of length.
To determine the distance between two objects, you can follow these steps:
1. Identify the two objects for which you want to find the distance.
2. Select a reference point or coordinate system to measure the distance.
3. Measure the distance along a straight line between the two objects, using the chosen unit of measurement.
For example, let's consider two cars parked on a street. To find the distance between them:
1. Identify the two cars.
2. Choose a reference point, such as a nearby lamppost.
3. Measure the distance from the lamppost to each car using a ruler or measuring tape. Let's say the distance from the lamppost to the first car is 50 meters, and the distance from the lamppost to the second car is 100 meters.
4. To find the distance between the two cars, subtract the shorter distance from the longer distance. In this case, 100 meters - 50 meters = 50 meters. Therefore, the distance between the two cars is 50 meters.
Remember, the distance between two objects is a numerical description of how far apart they are, and it is important to measure it accurately using the chosen unit of measurement.
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What happens if we nuke a city?
Answers
Answer:
Those who survived the bomb may become deaf or blind, as well as suffer catastrophic burns and injuries. Even people who were not seriously injured could become trapped within a structure or unable to navigate through the wreckage.
Explanation:
when a study participant no longer wants to disclose phi, what can be done?
Answers
When a study participant no longer wants to disclose PHI (Protected Health Information), several options are available to researchers. First, researchers can attempt to obtain informed consent from participants that specifically allows for withdrawal of participation or disclosure of PHI.
Second, researchers can offer participants the option to disclose only certain types of PHI or limit the scope of disclosure. If a participant still refuses to disclose PHI, researchers must respect the participant's wishes and cannot use or disclose the information in any way. It is important for researchers to maintain confidentiality and protect the privacy of study participants, and to ensure that all data collected is in compliance with relevant privacy laws and regulations.
When a study participant no longer wishes to disclose their PHI (Protected Health Information), it is crucial to respect their privacy and autonomy. In such cases, researchers should ensure informed consent is obtained and offer the option to withdraw or anonymize the participant's data. Compliance with HIPAA (Health Insurance Portability and Accountability Act) regulations is necessary, safeguarding the individual's rights and confidentiality. Open communication and transparency between the researcher and participant can help address concerns and maintain trust in the research process.
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The circumference of the Earth is
approximately 40,075 kilometers.
How many significant figures are
there in the numerical value?
Answers
Answer:
5 sig figures
Explanation:
3 points
A science teacher is going to make a Newton's Cradle using students on
swings. *
A
B C
Which of the following statements is true?
Answers
Answer:
When a ball on one end of the cradle is pulled away from the others and then released, it strikes the next ball in the cradle, which remains.
So it will be D
Explanation: Hope this helps :)
b. Two vectors with dimensions A = 5i + 3j + k and B = 4i + j + 2k are used for the following calculation. Determine: i. ii. iv. The dot product A.B. [2 marks] [3 Marks] The angle between vectors A and B. The cross product A XB. [2 marks] The area of the parallelogram spanned by the vectors A and B. [3 Marks]
Answers
The dot product is 25, the angle is \(\theta = cos^{-1} \frac{25}{\sqrt{35} \times \sqrt{21}}\), the cross product is 1i + (-6)j + (-7)k, and the area of the parallelogram spanned by vectors A and B is \(\sqrt{86}\).
Given,
A = 5i + 3j + k
B = 4i + j + 2k
i. Dot Product (A · B):
The dot product of two vectors A and B is given by the sum of the products of their corresponding components.
\(A.B = (A_x \times B_x) + (A_y \times B_y) + (A_z \times B_z)\\A.B = (5 \times 4) + (3 \times 1) + (1 \times 2) \\= 20 + 3 + 2 \\= 25\)
ii. Angle between vectors A and B:
The angle between two vectors A and B can be calculated using the dot product and the magnitudes of the vectors.
\(cos\theta = (A.B) / (|A| \times |B|)\\\theta = \frac{1}{cos} ((A.B) / (|A| \times |B|))\\A = \sqrt{(5^2 + 3^2 + 1^2)} =\\ \sqrt{35}\\B = \sqrt{(4^2 + 1^2 + 2^2)} \\= \sqrt{21}cos\theta = \frac{(A.B) / (|A| \times |B|)\\\theta = \frac{1}{cos} \frac{25}{\sqrt{35} \times \sqrt{21}}}\)
iv. Cross Product (A × B):
The cross product of two vectors A and B is a vector that is perpendicular to both A and B and its magnitude is equal to the area of the parallelogram spanned by A and B.
\(A\times B = (A_y \timesB_z - A_z \timesB_y)i + (A_z \timesB_x - A_x \timesB_z)j + (A_x \times B_y - A_y \times B_x)k\\A\times B = ((3 \times 2) - (1 \times 1))i + ((1 \times 4) - (5 \times 2))j + ((5 \times 1) - (3 \times 4))k\\= 1i + (-6)j + (-7)k\)
Area of the parallelogram spanned by vectors A and B:
The magnitude of the cross product A × B gives us the area of the parallelogram spanned by A and B.
Area = |A × B|
Area of the parallelogram spanned by vectors A and B:
Area = |A × B| =
\(\sqrt{(1^2 + (-6)^2 + (-7)^2}\\\sqrt{1+36+49\\\\\sqrt{86}\)
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Which of the forces applied to the block perform nonconservative work on the system?
Answers
The friction force applied to the block performs nonconservative work
on the system.
What is Friction force?The force preventing sliding against one another of solid surfaces, fluid layers, and material components is known as friction. There are various kinds of friction: Two solid surfaces in contact are opposed to one another's a relative lateral motion by dry friction.Friction between two surfaces causes kinetic energy from moving surfaces to be converted into thermal energy (that is, it converts work to heat). As demonstrated by the use of friction produced by rubbing pieces of wood together to start a fire, this property can have dramatic effects. Every time there is motion with friction, such as when a viscous fluid is stirred, kinetic energy is transformed into thermal energy. Wear is a significant side effect of many types of friction that can result in deteriorated performance or component damage. The discipline of tribology includes friction.The formula of the friction force F = μN
where,
F = friction force
μ = coefficient of friction
N = normal force
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The spring of a dart gun exerts a force on a 0.02 kg dart as it is launched from the gun with 4.00 J of KE. At what velocity does the dart come out of the gun?
Answers
Let's see
KE=1/2mv²m is mass and v is velocity
2KE=mv²4(2)=0.02v²8=2v²/1002v²=800v²=400v=20m/sNow consider a concrete example. Consider a particle with mass m in a 1D box of length L, with energy levels E n
=ℏ 2
π 2
n 2
/(2mL 2
), in thermal equilibrium with a heat bath at low temperature such that βE n=1
≫1 and only consider the first two quantum states. This might be a reasonable first approximation for an electron in a quantum dot. c) Calculate the heat capacity as a function of temperature at constant L for this system. Explain your result at T=0 in the context of the third law of thermodynamics. d) Calculate the 1D analog of pressure for this system, −∂A/∂L) T
. Show that at T=0, your result is equal to −dE 1
/dL. Interpret your result. e) We see now that heat is related to changing the occupancy (dp i
) of quantum states and work is related to changing the states themselves (dE i
). A process that takes place without heat is called "adiabatic." This word is also used in quantum mechanics to describe processes where the Hamiltonian of a quantum system is changed slowly. For example, for collections of atoms (e.g. molecules, solids, liquids, etc.) the BornOppenheimer approximation is a specific case of the adiabatic approximation where the Hamiltonian for the electrons, with a potential provided by the nuclei, is considered slowly varying. Discuss how these two meanings of the word are connected. Hint: For your particle in the box example above, consider a decidedly non-adiabatic process of suddenly doubling the size of the box L→2L. What happens to the occupancy of the states, and the entropy? What happens instead if we make the transformation L→2L slowly and smoothly?
Answers
The heat capacity of the 1D box system can be calculated at constant length (L), and the 1D analog of pressure can be derived and analyzed. Adiabatic processes and their connection to the changing occupancy of quantum states and work in quantum mechanics can also be discussed.
The heat capacity at constant length (L) for the 1D box system can be calculated by taking the derivative of the average energy (E) with respect to temperature (T). Since we are considering only the first two quantum states, the average energy is the sum of the energies of those states multiplied by their respective probabilities. By differentiating this expression with respect to temperature, we can obtain the heat capacity as a function of temperature.
At T=0, the heat capacity of the system is zero. This result aligns with the third law of thermodynamics, which states that as the temperature approaches absolute zero, the entropy of a pure crystalline substance also approaches zero. In this case, at T=0, the system occupies only the ground state, and there is no thermal excitation or contribution to the heat capacity.
The 1D analog of pressure for this system, represented as −∂A/∂L) T (where A is the Helmholtz free energy), can be shown to be equal to −dE 1/dL at T=0. This result indicates that the change in energy of the first quantum state with respect to the length of the box is related to the 1D analog of pressure. The interpretation is that increasing the size of the box leads to a decrease in energy for the ground state, analogous to a decrease in pressure in a classical system when the volume increases.
The term "adiabatic" has two related meanings in the context of thermodynamics and quantum mechanics. In thermodynamics, an adiabatic process is one that occurs without heat exchange with the surroundings. In quantum mechanics, adiabatic processes refer to changes in the Hamiltonian of a quantum system that are carried out slowly enough to maintain the system in its instantaneous eigenstate.
In the example of the particle in the box, a non-adiabatic process of suddenly doubling the size of the box leads to a change in the occupancy of the states. The ground state becomes less occupied, and the first excited state becomes more occupied. This change in occupancy affects the entropy of the system. On the other hand, if the transformation from L to 2L is performed slowly and smoothly, the system remains in its eigenstate throughout the process, and the occupancy of the states does not change significantly. In this case, the entropy remains constant.
The connection between the two meanings of adiabatic lies in the preservation of the system's quantum state during a slow change in the Hamiltonian. By ensuring that the system evolves in its instantaneous eigenstate, the adiabatic approximation allows for the adiabatic theorem to hold, stating that the system remains in the same eigenstate as long as the changes are slow enough. This connection highlights the importance of gradual changes in the Hamiltonian to maintain the integrity of the quantum state and preserve adiabatic conditions.
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Please select the word from the list that best fits the definition
Does not easily transfer electricity
conductor
insulator
circuit
current
Answers
Answer:
conductor
Does not easily transfer electricity
a pencil partially submerged in a glass of water appears broken or offset because of
Answers
When a pencil is partially submerged in a glass of water, it appears broken or offset due to the refraction of light. Refraction occurs when light passes through a medium with a different density than the one it was previously in, such as air and water. This causes the light to bend and change direction, resulting in the pencil appearing differently than it actually is.
The light that enters the water from the submerged portion of the pencil is refracted towards the normal (the imaginary line perpendicular to the surface of the water), while the light that enters the air from the exposed portion of the pencil is refracted away from the normal. This causes the image of the pencil to appear broken or offset at the water-air interface.
The degree of the bend depends on the angle of incidence and the refractive index of the medium. Hence, the amount of refraction varies with the thickness of the water column, making the pencil look even more broken or offset when viewed from different angles.
In conclusion, the illusion of a broken or offset pencil in water is caused by the refraction of light at the interface between water and air.
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A laser pulse has an energy of 22 J and a beam radius of 2 mm. The pulse duration is 15 ns and the energy density is constant within the pulse. (a) What is the spatial length of the pulse? m * (b) What is the total energy density within the pulse? kJ/m3 (c) Find the electric and magnetic amplitudes of the laser pulse. E0 = MV/m B0 = T
Answers
The energy delivered in each pulse is 330 x 10⁻⁹ Joules. The average value of the magnitude of the electric field is 1.17 x 10⁻² V/m.
What is an electric field?
A region of space surrounding an electrically charged particle or object known as an electric field is one in which an electric charge would experience force. A vector quantity called an electric field can be represented by arrows pointing in the direction of or away from charges.
Pulse emitted = 15 × 10⁻⁹ s
Radius = 2 × 10⁻³ m
Power= 22 W
Energy = U=P × t
=15 × 10⁻⁹ ×22
= 330 x 10⁻⁹ Joule
The electric field RMS value is given by
S= P/A = cε₀ E²(rms)
E(rms) = √(P/Acε₀)
= √[22/π(2x10⁻³)(3x10⁸)(8.85x10⁻¹²)
E(rms) = √[22/166.81x10⁻⁷]
E(rms) = √[22 / 1.6 x 10⁻⁵]
E(rms) = √[1.37 x 10⁻⁴]
E(rms) = 1.17 x 10⁻² V/m
The electric and magnetic amplitudes of the laser pulse in electric field is 1.17 x 10⁻² V/m.
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The three-dimensional arrangement of electron groups around the central atom is called ____.
A. Election-pair repulsion
B. Electronegativity
C. Geometric design
D. Electron-group geometry
Answers
Answer:
D. Electron - group geometry
Explanation:
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should senior citizens perform balance exercises?
A. to build muscle tissue
B. to reduce chances of falls
C. to build overall endurance
D. to reduce "staying power"
Please select the best answer from the choices provided.
Answers
Senior citizens should perform balance exercises because it reduces the chances of falls, hence option B is correct.
Why balance exercises are important for senior citizens?The ability to maintain balance, however, deteriorates with age, and poor balance is a key contributor to falls in older persons.
A fall can cause serious injuries, including fractures, which can lead to chronic pain, reduced quality of life, disability, or even death.
Seniors' mobility will significantly improve if their exercise regimen is increased.
Therefore, being solid and steady can improve your general confidence, ease various health concerns, and lessen your danger of falling.
Learn more about exercises, here:
https://brainly.com/question/934019
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Since the particles of liquids are able to slide past each other into different locations they have ______.
a. no definite volume
b. definite volume
c. definite shape
d. no definite shape