A boy jumps at a speed of 20.0 m/s at an angle of 25.0o above the horizontal. what is the horizontal component of the boy's velocity?

Sphere x, of mass 2 kg, is moving to the right at 10m/s. sphere y, of mass 4 kg, is moving to the left at 10m/s. the two spheres collide head-on. the magnitude of the impulse of x on y is:

You are riding on a school bus and suddenly get thrown forward. What did the bus just do? A. The bus makes a hard turn to the right. B. The bus is going forward and suddenly stops. C. The bus is going backward and suddenly stops. D.

Do molecules move in all states of matter?

The bob (weight) at the end of a pendulum has a mass of 0.3 kilograms. The bob is pulled to position B and allowed to swing. It goes all the way to position C and swings back. The potential energy of the bob at position B is joules.

A wire of resistivity ρ must be replaced in a circuit by a wire of the same material but four times as long. If, however, the total resistance is to remain as before, the diameter of the new wire mustA - be four times the original diameter.

How long does it take for sunlight to reach earth

What is the current when the power source supplies 100 volts to a 10 ohm resistor?

A stick of length 1.3 m is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it hits the floor, assuming that the end on the floor does not slip.

calculating power reach each scenario and then answer the questions scenario a 120 j of work is done in 6 seconds scenario b 160 j of work is done at 8 seconds scenario c200 J's of work is done in 10 seconds which scenario uses the most power

Which of the following is not an assumption that scientists must make about the natural world