Physics Answers

What is the velocity of a 0.5 kg ball that has a momentum of 3.0 kg m/s?

at what speed does a gun recoil if it weight 44.5 n and fires a 1.0g bullet at a 2500m/s

A pool ball leaves a 0.60-meter high table with an initial velocity of 2.4 m/s. Predict the time required for the pool ball to fall to the ground and the horizontal distance between the table's edge and the ball's landing location.

A sphere of mass 20 kg is attracted by another sphere of mass

30 kg with a force of 4x 10-5 V. What is the distance between the

spheres? Round your answer to the nearest hundredth.

What is the average density of a woman who floats in freshwater with 3% of her volume above the surface?

A large horseshoe magnet produces a magnetic field of strength 2×10−2 T in the region between the poles of the magnet. A wire of 5 cm length is placed in the field at the right angle to the field lines and carries a current of 15 mA. Calculate the force acting on a wire.

The mechanical power output of a cyclist moving at a constant speed of 6.60m/s on a level road is 124W. What is the force exerted on the cyclist and the bicycle by thr air?

A 6.00-kg piece of solid copper metal at an initial temperature T is placed with 2.00 kg of ice that is initially at – 20.0oC. The ice is in an insulated container of negligible mass and no heat is exchanged with the surroundings. After thermal equilibrium is reached, there is 1.20 kg of ice and 0.80 kg of liquid water. What was the initial temperature of the piece of copper?

A glass flask whose volume is 1000.00 cm3 at 0.0oC is completely filled with mercury at this temperature. When flask and mercury are warmed to 55.0oC, 8.95 cm3of mercury overflow. If the coefficient of volume expansion of mercury is 18.0 X 10-5 K-1 compute the coefficient of volume expansion of the glass.

1. Calculate the force of gravity on a 1.2x105 kg space station at a distance of 3.5x105 m from Earth’s surface.