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A) A 200-g block is dropped onto a vertical spring with spring constant k =220.0 N/m. The block becomes attached to the spring, and the spring compresses 29.5 cm before momentarily stopping. While the spring is being compressed, what work is done on the block by its weight?
B) While the spring is being compressed, what work is done on the block by the spring force?
C) What is the speed of the block just before it hits the spring? (Assume that friction is negligible.)
D) If the speed at impact is doubled, what is the maximum compression of the spring?
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A - 5.00 nC point charge is on the x axis at x = 1.20 m . A second point charge Q is on the x axis at -0.600m. a) What must be the sign and magnitude of Q for the resultant electric field at the origin to be 45.0N/C in the + x direction?
X rays diffract from a crystal in which the spacing between atomic planes is 0.193nm . The second-order diffraction occurs at 42.0?
A heat engine has an efficiency of 61.5% and it exhausts 7500 J of waste heat into the environment. How much work is performed by the previous heat engine
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What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20^circ {rm C}? Suppose that the air bubble is always in thermal equilibrium with the surrounding water.
If you swim from one point at the edge of the pool to another, along a straight line, what is the longest distance you can swim
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A copper wire has a resistance of 0.400 at 20.0°C, and an iron wire has a resistance of 0.430 at the same temperature
A cylinder is rolling along the ground without the slipping at 7m/s. It comes to a hill and begins going up. Assume no losses to friction, how high vertically would it go before it stops?
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