A weightlifter liftsa 1,250-N barbell 2 m in 3 s. how much power was used to lift the barbell?

A tuning fork vibrating at a frequency of 512hz is held over the top of the jar filled with water and filled with a tap at the bottom. If the jar is 60cm tall and the speed of sound is 350ms-1, determine 1st and 2nd resonance.

net force of 30 N is applied to a cart with a mass of 3.0 kg. a. What is the acceleration of the cart? a = m/s2 b. How long will it take the cart to travel 60 m, starting from rest?

A change in position of an object is its: A. Motion B. Acceleration C. Speed D. Momentum

Boyle's law says that the volume of a gas varies inversely with the pressure. when the volume of a certain gas is 5l, the pressure is 512 kpa (kilopascals). what is the pressure when the volume is 4l

If an electromagnet is used to pick up nails and other metal objects, what happens when the current is turned off?

Noah Formula is in an airplane which is flying at constant speed in a circular course of radius 6500 m, circling O'Hare's airplane prior to landing. Noah observed that the plane completes each round trip in 345 seconds (5 minutes & 45 seconds).

Two pieces of metal with exactly the same mass are placed on a surface in bright sunlight. The temperature of the 1st block increases by 3°C while the temperature of the 2nd increases by 8°C. If the specific heat of the 2nd block is 0.

The correctly balanced equation for H202 - H2O + O, is A) H202 - 2H2O + O2 B) H302 - H20+20, C) 2H, 02 - - 4H20 + 0, D) 2H, 02 - 2H30 + 0,

What happens to the wavelength of a wave if you increase the frequency?

In a transverse wave, the particle motion is what to wave motion? A. perpendicular B. parallel