Answers
Answer: i don’t even no I’m getting my credit up tho
Explanation:
I just need a way to cheat
Related Questions
A spring is used as part of a lift system and follows Hooke's law. If the spring is
displaced 85 cm when the force acting on it is 12500 N what is the displacement
when the force increases to 15500 N?
Answers
Answer:
1.05m or 105cm
Explanation:
Using the hooke's law equation as follows;
F = –k.x
Where;
F = force (N)
x = extension length (m)
k = constant of proportionality (N/m)
According to the information given in this question;
Displacement (x) = 85cm = 85/100 = 0.85m
Force = 12500N
Using F = kx, we find the proportionality constant
k = F/x
K = 12500/0.85
K = 14705.8N/m.
Also, since K = 14705.8N/m, the displacement (x), when the force increases to 15500N is;
F = kx
x = F/k
x = 15500/14705.8
x = 1.05m or 105cm
calculate the quantity of heat absorbed by 14 g
of water that warms from 30 ∘C
to 98 ∘C
Answers
The quantity of heat absorbed by 14 g of water that warms from 30 ∘C to 98 ∘C is approximately 4087.84 J.
What is heat absorbed?
Heat absorbed refers to the amount of thermal energy that is taken in by a substance or system during a process, such as heating up or melting.
The amount of heat absorbed by a substance is given by the equation:
Q = m * c * ΔT
Where:
Q = amount of heat absorbed or releasedm = mass of the substancec = specific heat capacity of the substanceΔT = change in temperature of the substanceFor water, the specific heat capacity is approximately 4.18 J/g°C.
Using the given values, we can calculate the amount of heat absorbed by the water as follows:
m = 14 g
c = 4.18 J/g°C
ΔT = (98°C - 30°C) = 68°C
Q = 14 g * 4.18 J/g°C * 68°C = 4087.84 J
Therefore, the quantity of heat absorbed by 14 g of water that warms from 30 ∘C to 98 ∘C is approximately 4087.84 J.
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A dog runs 51 m west to fetch a ball and brings it back only 27 m before stopping.
The total displacement of the dog is:
Answers
Two identical ice hockey pucks, labeled A and B, are sliding toward each other at speed v. Which one of the following statements is true concerning their momenta and kinetic energies?
a. p(A) = p(B) and KEA= KEB
b. pA= - pB and KEA= -KEB
c. pA= -pB and KEA= KEB
d. pa= pb and KEA =- KEB
Answers
Answer:
C. \(p_{A} = -p_{B}\) and \(K_{A} = K_{B}\).
Explanation:
The two hockey pucks travels in opposite sides with velocities of same magnitude, by definitions of linear momentum and translational kinetic energy:
Linear momentum
Hockey puck A
\(p_{A} = m\cdot v\) (1)
Hockey puck B
\(p_{B} = -m\cdot v\) (2)
\(p_{A} = -p_{B}\)
Translational kinetic energy
Hockey puck A
\(K_{A} = \frac{1}{2}\cdot m\cdot (v)^{2}\)
\(K_{A} = \frac{1}{2}\cdot m \cdot v^{2}\) (3)
Hockey puck B
\(K_{B} = \frac{1}{2}\cdot m\cdot (-v)^{2}\)
\(K_{B} = \frac{1}{2}\cdot m \cdot v^{2}\) (4)
\(K_{A} = K_{B}\)
Hence, the correct answer is C.
In the diagram, the distance OP is the focal length of the converging lens. One ray of light from O
is shown.
Through which point will this ray pass, after refraction by the lens?
Answers
The point through which this ray will pass, after refraction by the lens is point D.
What is refraction of light?The refraction of light refers to the bending or change in direction that occurs when light passes from one medium to another. It is a phenomenon that happens due to the difference in the speed of light in different substances.
From the ray diagram given, after the light incident from point O, it will pass the converging at point D which is the focal length of the lens after refraction.
Thus, based on the converging lens given in the ray diagram, we can conclude that, the point through which this ray will pass, after refraction by the lens is point D.
So point D is the correct answer.
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Why does carpet produce static electricity more than hardwood floors?
Answers
Answer:
The carpet has a buildup of electrons in it that get released onto your body when you rub across the floor while the hardwood doesn't have electrons built up inside of it.
Explanation:
I study that
The following are four electrical components.
A. A component which obeys ohm's law
B. Another component which obeys ohm's law
but which has higher resistance than A
A filament lamp
C.
D. A component, other than a filament lamp,
which does not obey ohm's law.
a. For each of these components, sketch current-
voltage characteristics, plotting current on the
vertical axis, and showing both positive and
negative values. Use one set of axes for A and
B, and separate sets of axes for C and for D.
label your graphs clearly.
b.
Explain the shape of the characteristic for C
c. Name the component you have chosen for D.
Answers
For the following are four electrical components:
a. For components A and B, both of which obey Ohm's law, the current-voltage characteristics would be a straight line passing through the origin. The slope of the line for component B would be steeper than that of component A, indicating higher resistance.
b. The shape of the characteristic for component C, the filament lamp, can be explained by its construction. A filament lamp consists of a filament made of a resistive material, typically tungsten, which heats up and emits light when an electric current passes through it.
c. The component chosen for D, which does not obey Ohm's law, could be a diode. A diode is a two-terminal electronic component that allows the current to flow in only one direction.
For the following are four electrical components:
a. Sketches of current-voltage characteristics:
For components A and B, both of which obey Ohm's law, the current-voltage characteristics would be a straight line passing through the origin. The slope of the line for component B would be steeper than that of component A, indicating higher resistance.
Current (I)
^
| B
| /
| /
| /
| /
| /
| /
| /
| /
| /
|/
+------------------> Voltage (V)
Current (I)
^
| A
| /
| /
| /
| /
| /
| /
| /
| /
| /
|/
+------------------> Voltage (V)
For component C, a filament lamp, the current-voltage characteristic would be a curve that is not linear. It would exhibit a non-linear increase in current with increasing voltage. At lower voltages, the lamp would have low resistance, but as the voltage increases, the resistance of the filament also increases due to the phenomenon of thermal self-regulation. This leads to a slower increase in current at higher voltages.
For component D, a component that does not obey Ohm's law, the current-voltage characteristic could be any non-linear curve depending on the specific component chosen. Examples of components that do not obey Ohm's law include diodes and transistors.
b. The shape of the characteristic for component C, the filament lamp, can be explained by its construction. A filament lamp consists of a filament made of a resistive material, typically tungsten, which heats up and emits light when an electric current passes through it. As the voltage across the filament increases, the temperature of the filament increases as well, causing its resistance to increase. This increase in resistance results in a slower increase in current with increasing voltage, leading to the characteristic non-linear curve observed.
c. The component chosen for D, which does not obey Ohm's law, could be a diode. A diode is a two-terminal electronic component that allows the current to flow in only one direction. It exhibits a non-linear current-voltage characteristic where it conducts current only when the voltage is above a certain threshold, known as the forward voltage. Below this threshold, the diode has a high resistance and blocks current flow in the reverse direction. The characteristic curve of a diode would show negligible current flow until the forward voltage is reached, after which it exhibits a rapid increase in current with a relatively constant voltage.
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You are pushing a cart across the room, and the cart has wheels at the front and the back. Your hands are placed on top of the cart at the center (left to right) of the top edge, pushing horizontally. There is friction between the wheels and the floor. Is the normal force between the floor and the front wheels greater than, smaller than, or equal to the normal force between the floor and the rear wheels? a) The force on the front wheels must be smaller than the force on the rear wheels. b) The force on the front wheels must be equal to the force on the rear wheels. c) The force on the front wheels must be greater than the force on the rear wheels.
Answers
Answer:
The normal force is the force that the floor does as a reaction of the gravitational force that an object does against the floor (is the resistance that objects have when other objects want to move trhough them, and the force comes by the 3rd Newton's law, and this is specially used in cases where the first object is fixed, like walls or the floor). With this in mind, the point in where the normal force will be greater is the point that is closer to the center of mass of the object (the point with more mass)
If the wheels are in the extremes of the object, and the center of mass is in the middle of the object, the normal force will be equal. Now if for example, you put a little mass in one end of the object, now the center of weight displaces a little bit and is not centered, and the side is where you put the weight on will receive a bigger normal force from the floor than the other side.
The force on the front and rear wheels can be determined by finding the
force acting under equilibrium conditions.
The normal reaction between the floor and the front wheel is larger. The
correct option is c) The force on the front wheels must be greater than the
force on the rear wheels.
Reasons:
The forces acting on the wheels are;
Vertical forces acting on the cart:
The weight of the cart acting on the floor
The normal reaction of the floor on the wheels
The horizontal acting on the cart:
Pushing force acting horizontally
Friction force acting in the reverse direction
At equilibrium, the cart does not tip over
Sum of moment about the rear wheel = \(\mathbf{W \times \dfrac{d}{2} + F \times h - N_{front} \times d} = 0\)
Where;
h = The height of the cart
d = depth of the cart
\(N_{front}\) = The normal reaction at the front wheels
Therefore;
\(\displaystyle N_{front} = \frac{W \times \dfrac{d}{2} + F \times h}{d} = \mathbf{ \frac{W}{2} + \frac{F \times h}{d}}\)
Sum of moment about the front wheel = \(\mathbf{ F \times h + N_{rear} \times d - W \times \dfrac{d}{2} } = 0\)
Therefore;
\(\displaystyle N_{rear} = \frac{W \times \dfrac{d}{2} - F \times h}{d} = \mathbf{ \frac{W}{2} - \frac{F \times h}{d}}\)
Which gives;
\(\displaystyle N_{front} = \mathbf{ \displaystyle N_{rear} + 2 \times \frac{F \times h}{d}}\)
\(\displaystyle 2 \times \frac{F \times h}{d} > 0\)
Therefore;
\(\displaystyle N_{front} > \displaystyle N_{rear}\)
The correct option is c) The force on the front wheels must be greater than
the force on the rear wheels.
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If a battery stores 1000 C of charge, how many seconds will it power a lamp for if the current through the lamp is 5.0 A?
Answers
Answer:
200seconds
Explanation:
Q=IT
1000c=5T
T=1000/5
T=200secs
I hope this will help
kindly follow ne
Each of the following figures shows a person (not to scale) located on Earth at either 40°N or 40°S latitude. Rank the figures based on how much time the person spends in daylight during each 24-hour period, from most to least. To rank items as equivalent, overlap them.
Answers
The ranking is based on the tilt of the Earth's axis and its orbit around the Sun. The figure at 40°N in June receives the most daylight because it is located at a high latitude during the summer solstice in the Northern Hemisphere. The Earth's axis tilts towards the Sun, resulting in longer days and shorter nights. The figure at 40°S in December receives a moderate amount of daylight as it is located at a lower latitude during the summer solstice in the Southern Hemisphere.
The figure at 40°N in December experiences less daylight because it is located at a high latitude during the winter solstice in the Northern Hemisphere, with shorter days and longer nights. Lastly, the figure at 40°S in June receives the least amount of daylight as it is located at a lower latitude during the winter solstice in the Southern Hemisphere, where the days are shortest and the nights are longest. Based on the information given, the ranking of figures based on the amount of daylight they experience in a 24-hour period, from most to least.
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In your business plan, the target market section should clearly identify_____market(s).
A. Both your primary and secondary
B. primary
C. demographic
D. secondary
Answers
In your business plan, the target market section should clearly identify both your primary and secondary market(s). The market analysis is basically the target market section of your business plan. It is a thorough examination of the ideal people to whom you intend to sell your products or services.
The centrifuge at NASA Ames Research Center has a radius of 8.8 m and can produce forces on its payload of 20 gs or 20 times the force of gravity on Earth. (a) What is the angular momentum of a 20-kg payload that experiences 10 gs in the centrifuge? (b) If the driver motor was turned off in (a) and the payload lost 10 kg, what would be its new spin rate, taking into account there are no frictional forces present?
Answers
(a) The angular momentum of a 20-kg payload experiencing 10 gs in a centrifuge with a radius of 8.8 m is 5,483 kg m^2/s. (b) If the payload loses 10 kg, the new spin rate taking into account no frictional forces present is 7.54 rad/s.
(a) The angular momentum of a rotating object is given by:
L = Iω
where L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.
The moment of inertia for a point mass rotating in a circle is given by:
I = mr^2
where m is the mass of the object and r is the radius of the circle.
To calculate the angular momentum of the 20-kg payload that experiences 10 gs in the centrifuge, we first need to calculate the angular velocity of the payload. The force on the payload is 10 times the force of gravity on Earth, so the net force on the payload is:
F = ma
F = (10 × 9.8 m/s^2) × 20 kg
F = 1960 N
The net force on the payload is the centripetal force, which is given by:
F = mv^2/r
where v is the velocity of the payload.
Rearranging this equation to solve for v:
v = sqrt(Fr/m)
v = sqrt((1960 N) × (8.8 m) / (20 kg))
v = 33.2 m/s
The angular velocity of the payload is:
ω = v/r
ω = 33.2 m/s / 8.8 m
ω = 3.77 rad/s
Finally, we can calculate the angular momentum of the payload:
L = Iω
L = (mr^2)ω
L = (20 kg) × (8.8 m)^2 × 3.77 rad/s
L = 5,483 kg m^2/s
(b) When the payload loses 10 kg, its new moment of inertia becomes:
I' = m'r^2
I' = (10 kg) × (8.8 m)^2
I' = 774.4 kg m^2
Conservation of angular momentum tells us that:
L = Iω = I'ω'
where ω' is the new angular velocity of the payload.
Solving for ω':
ω' = (I/I')ω
ω' = ((20 kg) × (8.8 m)^2 × 3.77 rad/s) / ((10 kg) × (8.8 m)^2)
ω' = 7.54 rad/s
So, the new spin rate of the payload is 7.54 rad/s.
Therefore,(a) For a 20-kg payload experiencing 10 gs in a centrifuge with an 8.8 m radius, the angular momentum is 5,483 kg m^2/s. (b) If the payload's mass reduces by 10 kg without any frictional forces present, the new spin rate is 7.54 rad/s.
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Do we know which has more potential energy? object A or B? Best answer with reasoning gets brainliest.
Answers
Answer:
Object C has the most potential energy.
Between A and B, we do not know which has more potential energy.
Explanation:
We know the object with the most potential energy and this is the object at C.
Potential energy is the energy due to the position of a body above the ground surface.
The higher a body is above ground, the more its potential energy.
Potential energy = mass x acceleration due to gravity x height
So;
Object C has the most potential energy.
Between A and B, we do not know which has more potential energy.
This is because, the height and mass of the objects are not quantified using numbers.
Potential energy is a function of mass and height and acceleration due to gravity but acceleration due gravity is a constant.
A massage technique that consists of applying pressure to specific points of the face and body to release muscle tension, stimulate and restore balance (chi) is known as
Answers
Answer:Acupressure
.
.
..
But why post this question in Physics
A student trying to calculate the coefficient of friction between a box and a surface. She measures that the 80kg box will slide if the student pushes with a force greater than 400n.
Answers
Answer:
\(\mu_s=0.51\)
Explanation:
Coefficient of friction
The static coefficient of friction is a measure of the force needed to start moving an object from rest along a rough surface.
It's calculated as:
\(\displaystyle \mu_s=\frac{F_r}{N}\)
Where Fr is the friction force and N is the normal force exerted by the surface over the object.
In the absence of any other vertical force, the normal is equal to the weight of the object:
\(N = W = m.g\)
The box has a mass of m=80 Kg, thus the normal force is:
\(N = 80\ Kg * 9.8\ m/s^2\)
N = 784 N
The student needs to push with a force of 400 N to make the box move. That is the force that barely outcomes the friction force. Thus:
\(F_r=400\ N\)
Calculating the coefficient:
\(\displaystyle \mu_s=\frac{400}{784}\)
\(\mathbf{\mu_s=0.51}\)
An aluminum wing on a passenger jet is
25 m
long when its temperature is
19°C.
At what temperature would the wing be 3 cm (0.03 m) shorter?
Answers
The wing is made of aluminum, therefore: α = 25 x 10-6 /oC Length: l = 29 m, Temperature: T1 = 29 C and Change in length: Δl = -7 cm (-0.07 m)
What is Aluminium wire?α = 25 x 10-6 /oC,Δl = αlΔT = αl(T2 - T1)
The equation for what you don't know: Δl = αl(T2 - T1); divide both sides by αl Δl/ αl = (αl/ αl )(T2 - T1) = T2 - T1; add T1 to both sides. Δl/αl + T1 = T2 - T1 + T1 = T2 and Δl/ αl + T1 = T2
Δl/ αl + T1 = T2
= (-0.07 m)/( 25 x 10-6 /oC x 29 m) + 29 C = -96.551 oC + 29 C
= -67.551 oC = -67.6 C.
Therefore, The wing is made of aluminum, therefore: α = 25 x 10-6 /oC Length: l = 29 m, Temperature: T1 = 29 C and Change in length: Δl = -7 cm (-0.07 m).
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Question 2
What is the best description of the destructive interference of light?
(A) A longitudinal wave meets a transverse light wave.
(B) The crest of one wave overlaps with the trough of another.
(C) A mechanical wave meets an electromagnetic wave.
(D) The crests of two waves intersect.
Question 4
Which statement correctly compares radio waves and microwaves?
(A) Radio waves have longer wavelengths and higher frequencies than microwaves
(B) Radio waves have longer wavelengths and lower frequencies than microwaves
(C) Radio waves have shorter wavelengths and higher frequencies than microwaves
(D) Radio waves have shorter wavelengths and lower frequencies than microwaves
Question 6
Exposure to what type of radiant energy is sensed by human skin as warmth?
(A) infrared
(B) x-rays
(C) ultraviolet
(D) gamma rays
Question 8
See picture linked for prism
The image shows an example of white light entering a prism and coming out as colors of the rainbow.
How does a prism produce the colors of the rainbow from white light?
(A) by changing the wavelength of white light into other wavelengths
(B) by reflecting light with white wavelengths and transmitting light with colored wavelengths
(C) by separating the light of different wavelengths
(D) by absorbing colorless wavelengths from white light
Question 10
Which statement best explains the path light takes as it travels?
(A) Light curves to spread out through openings and move around barriers.
(B) Light takes a curved path through matter and takes a straight path through space.
(C) Light moves in a straight line except at surfaces between different transparent materials, where its path bends.
Answers
Option. (B) The crest of one wave overlaps with the trough of another is the best description of the destructive interference of light. The statement Option (B) Radio waves have longer wavelengths and lower frequencies than microwaves correctly compares radio waves and microwaves. Exposure to Option (A) infrared radiant energy is sensed by human skin as warmth. prism produces the colors of the rainbow from white light Option (C) by separating the light of different wavelengths. Option(C) Light moves in a straight line except at surfaces between different transparent materials, where its path bends.
Question 2The best description of the destructive interference of light is when the crest of one wave overlaps with the trough of another wave.
Destructive interference occurs when two waves combine to form a wave of lower amplitude.
When this happens, the crest of one wave overlaps with the trough of another, reducing the overall amplitude of the wave.
Question 4Radio waves have longer wavelengths and lower frequencies than microwaves.
This implies that they also have lower energy and are less dangerous than microwaves.
Microwaves have shorter wavelengths, higher frequencies, and higher energy than radio waves.
Question 6Exposure to infrared radiant energy is sensed by human skin as warmth.
This is because the infrared wavelengths correspond to thermal energy, which means that they cause molecules to vibrate faster and generate heat when absorbed by objects.
The sun is a source of infrared radiation that is sensed by our skin as warmth.
Question 8A prism produces the colors of the rainbow from white light by separating the light of different wavelengths.
When white light enters a prism, it is refracted and separated into its component colors because each color has a different wavelength.
This is because each color bends differently as it passes through the prism, which causes them to separate and form a rainbow of colors.
Question 10Light moves in a straight line except at surfaces between different transparent materials, where its path bends.
This bending of light is known as refraction and occurs because light travels at different speeds through different materials.
When light moves from one material to another, such as from air to glass, it changes speed and direction, causing its path to bend.
This is why lenses and prisms can be used to bend and focus light in specific ways.
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5. In the diagram below, Aircraft A is flying East and maintaining a groundspeed of 340 kt (a kt = speed of 1 NM / hr). Aircraft B is flying in the same direction as aircraft A but 210 NM ahead, maintaining a ground speed of 280 kt. Aircraft A will catch Aircraft B at Point ‘X’. What distance will Aircraft B have travelled when this event occurs?
Answers
Aircraft B will have travelled 980 NM when it is caught up by Aircraft A.
We can begin by using the formula:
distance = rate × time
Let's first find the time it will take for Aircraft A to catch up with Aircraft B. Since both are flying in the same direction, the relative speed between them will be the difference in their ground speeds:
relative speed = ground speed of A - ground speed of B
= 340 kt - 280 kt
= 60 kt
The distance between the two aircraft is 210 NM. Using the relative speed, we can find the time it will take for Aircraft A to catch up to Aircraft B:
time = distance / relative speed
= 210 NM / 60 kt
= 3.5 hours
Now, we can find how far Aircraft B will have travelled in 3.5 hours at its own ground speed of 280 kt:
distance = rate × time
= 280 kt × 3.5 hours
= 980 NM
Therefore, Aircraft B will have travelled 980 NM when it is caught up by Aircraft A.
What is an aircraft?
An aircraft is a machine that is designed to be able to fly through the air. It typically has fixed or rotary wings, and is powered by engines or other propulsion systems. Aircraft come in a wide variety of shapes and sizes, from small, single-engine planes to large commercial airliners and military aircraft.
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1. A 20 Ohm resistor and a 5 Ohm lamp are connected in a single path, with a 50 amps.
What type of circuit is this:
What is the total resistance of the circuit?
What is the total voltage in this circuit?
What is the current?
Answers
The circuit given is a series resistance circuit.
1) The given circuit is a series resistance circuit.
2) Resistance, R₁ = 20 Ω
Resistance, R₂ = 5 Ω
The effective resistance of the circuit is given by,
Reff = R₁ + R₂
Reff = 20 + 5
Reff = 25 Ω
3) Total resistance of the circuit, R = 25 Ω
Current flowing through the circuit, I = 50 A
Therefore, the voltage across the circuit is,
V = IR
V = 50 x 25
V = 1250 V
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Consider a 2D plate with surface area A = 100 cm2
that we charge with a certain
charge Q. How large does Q need to be for the field of the plate to levitate a load of m = 100 kg
that has charge q = 25 µC?
Answers
The value of charge in the plate to levitate a load of mass of 100 kg will be 1.33 x 10^-5 C.
The electric field(E) produced by a 2D plate is given by the following formula:
E = σ/2ε
Here σ is the surface charge density = Charge/Area = Q/A
To levitate a plate, the force exerted by this field should be equal to the weight of the load.
Thus,
Electric force due to plate = Weight of the load
qE = mg
Putting the given values in the above equation
Q x Q/2Aε = mg
Q^2 = mg(2ε)(A)
On solving
Q = 1.33 x 10^-5 Coulombs.
Thus, The value of charge in the plate to levitate a load of mass of 100 kg will be 1.33 x 10^-5 C.
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4. Answer the following questions in terms of a wave's frequency, wavelength, amplitude, and
energy.
a. Describe the characteristics of a high pitch wave.
b. Describe the characteristics of a high-volume wave.
Answers
a. A high-pitch wave is characterized by a high frequency and a short wavelength. The frequency determines the pitch of the sound, with higher frequencies corresponding to higher pitches.
The wavelength is the distance between two consecutive peaks or troughs of the wave and is inversely proportional to the frequency. Therefore, a high-pitch wave has a shorter wavelength.
The amplitude of the wave, which is the height of the peak or the depth of the trough, is not directly related to the pitch of the sound, but it does determine the volume or intensity of the sound.
b. A high-volume wave is characterized by a high amplitude and a relatively long wavelength. The amplitude determines the volume or intensity of the sound, with higher amplitudes corresponding to louder sounds.
The wavelength of the wave does not directly affect the volume of the sound, but it can affect how the sound is perceived in different environments.
In general, longer wavelengths are more effective at traveling through obstacles such as walls and are better at penetrating long distances, whereas shorter wavelengths are more easily scattered and attenuated in the atmosphere.
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Which is the absolute location of St. Louis, Missouri?
38 ½° N, 90 ½° W
near the border of Missouri and Illinois
southwest of Chicago, Illinois
42° N, 100° W
Map of U S showing Iowa, Illinois, Indiana, Missouri, Kentucky, Chicago, Indianapolis, Saint Louis, forty degrees North, and ninety degrees West
Answers
Answer:
The first is the closest in absolute values.
The second two are vague and the last is approximate.
A wave with a period of .0005 s/cycle has what frequency? Please help me my teacher didn’t explain good .
Answers
Answer: frequency f = 2000 1/s (Hz)
Explanation: period T means time for one cycle and frequency f tells how many cycles there are in seconds. Unit of frequency is 1/s= Hz. Period T = 1/f and frequency f= 1/T.
E.g is T= 0.01 s then f= 1/ (0.01 s) = 100 Hz. And I'd frequency is 20 Hz,
T= 1/(20 Hz)= 0.05 s. So, if T = 0.005 s, f= 1/T
You preform an experiment to measure the speed of a car overtime. the data are shown in the table below. What graph shows the data from this experiment?
Answers
Answer:
C
Explanation:
Check for coordinates of the VT graph in C part. The information matches with the table.
Find I1, V1, and V2 for the circuit shown in Fig. 4
Answers
From the given circuit, the value of I1 = -4 Amp, V1 = -4 V, and the V2 = 4V. Ohm's law has three different variations that are related to voltage, current, and resistance. The relationship between the voltage across the terminals and the resistor's resistance determines the current for a constant flow of current.
What is the tenet of Ohm's law?According to Ohm's law, the voltage across a conductor determines how much current flows through it. For many materials, including metals, this is true so long as the temperature (as well as other physical parameters) stay constant.
What does "nodal analysis" mean?Any electrical network may be solved using nodal analysis, which is what it is called. the formula used to determine how much voltage is shared across circuit nodes. Since the node voltages are with respect to the ground, this method is also referred to as the node-voltage method.
Applying KCL,
I1 = -1 -3
I1 = -4 A
Applying concept of super-node,
V2 = 4V
\(\frac{4-V1}{2} -1-3=0\)
\(2-\frac{V1}{2} =4\)
\(\frac{-V1}{2} =4-2\)
\(V1=-4V\)
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A car starts from rest and accelerates at a constant rate in a straight line. In the first second the car moves a distance of 2.0 meters. How much additional distance will the car move during the second second of its motion?
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Since the car is accelerating at a constant rate, the distance it travels during each second of its motion will be directly proportional to the time it has been accelerating.
In the first second, the car moved a distance of 2 meters, and in the second second, it will move twice the distance of the first second, so the car will move additional distance of 2*2 = 4 meters during the second second of its motion.
The distance traveled during the second second of its motion is 1/2 * 2 = 1 meters.
A car that accelerates at a constant rate will move a distance equal to the initial velocity multiplied by time plus 1/2 the acceleration multiplied by the square of time. Since the car starts from rest, the initial velocity is zero.
Therefore, the distance traveled during the second second is 1/2 * acceleration \(* (time)^2 = 1/2 * a * t^2 = 1/2 * a * 1^2 = 1/2 * a\) Since the car moved 2.0 meters in the first second, it means the acceleration is\(2m/s^2\), and the distance traveled during the second second is 1/2 * 2 = 1 meters.
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One factor that all psychologists have in common is _____________.
A. the same advanced degree
B. the interest in educational psychology
C. the same undergraduate degree
D. the interest in the study of the human mind and behavior
FOR PSYCHOLOGY! PLEASE HELP!!
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Answer: D
Explanation: Tell me if it's correct of not. That's the only one I think would be right besides B.
calculate the potential energy of a stone of mass 0.5g thrown vertically upward with a velocity of 10m/s. calculate:
1. The potential energy at the greatest height and value of h
2. The kinetic energy on reaching the ground again
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how does mass relates to latent heat?
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The mass of a substance is not directly related to latent heat. Instead, latent heat is a parameter that describes the amount of energy required or released during a phase shift of a substance.
What is latent heat?Latent heat can be thought of as hidden energy that is supplied or extracted to change the state of a substance without changing its temperature or pressure.
Latent heat is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process—typically a first-order phase transition.
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8. All nuclear power plants have backup generators in case the plant stops producing electricity. Why is this necessary? What exactly are the generators providing power for? What might happen if these backup generators fail?
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Nuclear power plants have backup generators to ensure that essential equipment, such as cooling systems, can continue to function in the event of a power outage or other emergency.
Nuclear power plants rely on a constant supply of electricity to operate the equipment that controls the nuclear reaction and cools the reactor. If the power supply is interrupted, the reactor can overheat and damage can occur. Backup generators provide power to essential equipment, such as cooling systems, that keep the reactor and spent fuel pools from overheating. If the backup generators fail, there is a risk of a nuclear accident, as was seen in the disaster in 2011, where the failure of backup generators led to a loss of cooling and a major nuclear incident.
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