A muscle builder holds the ends of a masslessrope. At the

center of the rope, a 15kg ball is hung. What is the tension in the

rope if the angle is4.5degrees?

Is the number of protons and electrons the same for a neutral atom of a given element?

A ball is dropped from the top of a cliff. By the time it reaches the ground, all the energy in its gravitational potential energy store has been transferred into its kinetic energy store.

Which of the following statements are true for an adiabatic process? Check all that apply. Check all that apply. An adiabatic process is carried out at constant temperature. An adiabatic process is carried out at constant volume.

If a wave has a speed of 100 m/s and a wavelength of 20 meters, what is the frequency?

Three ways to accelerate an object?

3. As the duration of a maximal effort increases from 10 seconds or less to between 10 and 180 seconds, what factor becomes limiting in terms of energy production?

Near the top of the Citigroup Bank building in New York City, there is a 4.00 105 kg mass on springs having adjustable force constants.

Which of the following is true about Viscosity of liquids: A) Liquids with high viscosity do not flow as well as liquids with low viscosity. B) Liquids with high viscosity flow better than liquids with low viscosity.

An object is dropped from a bridge. A second object is thrown downwards 1.0 s later. They both reach the water 20 m below at the same instant. What was the initial speed of the second object

The Congo River is in Africa. True or False