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Q. A 25 kg solid door is 220 cm tall, 94 cm wide. What is the door's moment of inertia for rotation about a vertical axis inside the door, 13 cm from one edge?
Q. A bullet of mass 4.3 g is fired horizontally into a 8.6 kg wooden block at rest on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.13. The bullet stops in the block, which slides straight ahead for 2.4 m (without rotation). (a) What is the speed of the block immediately after the bullet stops relative to it? (b) At what speed is the bullet fired?
A capacitor (capacitance C1) is connected across the terminals of an ac generator. Without changing the voltage or frequency of the generator, a second capacitor (capacitance C2) is added in series with the first one.
The basic concepts in optics.
A 1.20 liter flask contains a certain quantity of ideal gas at 305 K. after that an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.30 times its unique value. What is the final temperature.
The stairs are 83 long and inclined at the angle of 31. If a player has a mass of 87, estimate his average power output on the way up. Overlook friction and air resistance.
A 2.5 mol sample of helium gas initially at 300 K and 0.400 atm is compressed isothermally to 1.30 atm. Note down that the helium behaves as an ideal gas.
What is water speed along the boat during the vertical cross
Get the expression for how moving clocks run slowly when seen by observers at rest.
Kelli weighs 417 N, and she is sitting on a playground swing that hangs 0.44 m above the ground. Her mom pulls the swing back and releases it when the seat is 1.00 m above the ground. Imagine that air resistance is negligible.
What is the speed of the projectile
What will transform in terms of the observable properties of the black hole as this process continues
A 3.20 kg block of wood sits on a table. A 2.50 g bullet, fired horizontally at a speed of 600 m/s, goes completely through the block, emerging at the speed of 180m/s. What is the speed of the block immediately after the bullet exits.
A worker drops a wrench from the top of a tower 88.00 m tall. With what velocity does the wrench strike the ground? (Suppose the positive direction is upward.)
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