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castortr0y [4]
3 years ago
14

Which equation correctly represents the gravitational potential energy of a

Physics
2 answers:
Lerok [7]3 years ago
7 0

Answer:

GPE = ME − 1/2​ mv^2

Explanation:

Just did it

arsen [322]3 years ago
5 0

Answer:

PE=ME-\dfrac{1}{2}mv^2

Explanation:

The mechanical energy of an object is equal to the sum of kinetic energy and the potential energy. Let ME is mechanical energy, KE is kinetic energy then its potential energy PE is given by :

ME=PE+KE

Since, KE = (1/2) mv^2

PE=ME-KE\\\\PE=ME-\dfrac{1}{2}mv^2

So, PE=ME-\dfrac{1}{2}mv^2 correctly represents the gravitational potential energy of a  .system

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You want the current amplitude through a inductor with an inductance of 4.70 mH (part of the circuitry for a radio receiver) to
goldenfox [79]

Answer:

f = 1.69*10^5 Hz

Explanation:

In order to calculate the frequency of the sinusoidal voltage, you use the following formula:

V_L=\omega iL=2\pi f i L         (1)

V_L: voltage = 12.0V

i: current  = 2.40mA = 2.40*10^-3 A

L: inductance = 4.70mH = 4.70*10^-3 H

f: frequency = ?

you solve the equation (1) for f and replace the values of the other parameters:

f=\frac{V_L}{2\pi iL}=\frac{12.0V}{2\pi (2.4*10^{-3}A)(4.70*10^{-3}H)}=1.69*10^5Hz      

The frequency of the sinusoidal voltage is f

3 0
3 years ago
When you take your 1900-kg car out for a spin, you go around a corner of radius 55 m with a speed of 15 m/s. The coefficient of
pentagon [3]

Answer:

7772.72N

Explanation:

When u draw your FBD, you realize you have 3 forces (ignore the force the car produces), gravity, normal force and static friction. You also realize that gravity and normal force are in our out of the page  (drawn with a frame of reference above the car). So that leaves you with static friction in the centripetal direction.

Now which direction is the static friction, assume that it is pointing inward so

Fc=Fs=mv²/r=1900*15²/55=427500/55=7772.72N

Since the car is not skidding we do not have kinetic friction so there can only be static friction. One reason we do not use μFn is because that is the formula for maximum static friction, and the problem does not state there is maximum static friction.

7 0
3 years ago
student saw a science fiction movie in which a spaceship was zooming through space. The sound of the engine was loud. However, h
Serhud [2]
Sound waves move through molecules. When there are no molecules in a certain space, sound cannot travel - whether in a vacuum or in space. 
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3 years ago
Read 2 more answers
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