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During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 4.70 108 V, with the cloud being at the higher potential. What is the change in an electron's electric potential energy when the electron moves from the ground to the cloud?
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The position of an object connected to a spring varies with time according to the expression x = (4.4 cm) sin(6.9?t). (a) Find the period of this motion. s (b) Find the frequency of the motion. Hz (c) Find the amplitude of the motion. cm (d) Find ..
If the backpack begins to slide when the spring ( = 150 ) stretches by 2.40 , what is the coefficient of static friction between backpack and table.
A hot-air balloon is ascending at the rate of 14 m/s and is 57 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?
Consider N atoms confined on a surface of area A at temperature T. The atoms form a two-dimensional (2D) gas of classical, non interacting particles.
find out the average force exerted on the bullet by the expanding gases as the bullet moves through the length of the 50 cm barrel.
The tension Tu in upper (taut) segment of the belt is 170 N, and flywheel has a clockwise angular acceleration of 1.67 rad/s2. Find out the tension in the lower (slack) segment of the belt.
An osprey’s call is a distinct whistle at 2200 {rm Hz}. An osprey calls while diving at you, to drive you away from her nest. You hear the call at 2300 {rm Hz}. Explain how fast is the osprey approaching?
What is the minimum coefficient of friction that will prevent sliding. What should be the highest speed of the car so it can round the curve safely.
You have a great summer job working in a cancer research laboratory. Your team is trying to construct a gas laser that will give off light of an energy that will pass by the skin but be absorbed by cancer tissue.
Two cylindrical rods are identical, except that one has a thermal conductivity k1 and the other has a thermal conductivity k2. they are placed between two walls that are maintained at different temperatures TW (warmer) and TC (cooler).
In general, for a concave mirror with a focal length +f, how far should an object be placed from the mirror to form a real image which is neither enlarged nor reduced(enter your answer as a multiple of f)?
A slide projector needs to create a 97 cm high image of a 2.0 cm tall slide, How far should you place the lens from the slide
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