Naso

In a physics lab experiment, a spring clamped to the table shoots a 22 g ball horizontally. When the spring is compressed 22 cm, the ball travels horizontally 5.2 m and lands on the floor 1.3 m below the point at which it left the spring. What is the spri...

A marble slides without friction in a vertical plane around the inside of a smooth, 21 cm-diameter horizontal pipe. The marble's speed at the bottom is 4.5 m/s this is fast enough so that the marble makes a complete loop, never losing contact with the pip...

The label on a candy bar says 470 Calories. Assuming a typical efficiency for energy use by the body, if a 74 person were to use the energy in this candy bar to climb stairs, how high could she go?

At what cold-reservoir temperature (in degree C) would a Carnot engine with a hot-reservoir temperature of 350degree C have an efficiency of 70%?

Find the maximum possible coefficient of performance for a heat pump used to heat a house in a northerly climate in winter. The inside is kept at 24 degree C while the outside is -24 degree C.

Assuming a typical efficiency for energy use by the body, if a 74 kg person were to use the energy in this candy bar to climb stairs, how high could she go?