What do we need to measure in order to determine a star's luminosity?

Two charged objects, A and B, are exerting an electric force on each other. What will happen if the charge on A is increased?

How high must a basketball of mass 0.62 kg be lifted to increase its GPE by 6.7 J?

Why do you get warm when you exercise

A raft is made of 10 logs lashed together. Each is 56cm in diameter and has a length of 6.1m. How many people can the raft hold before they start getting their feet wet, assuming the average person has a mass of 69 kg?

some communities might be opposed to treating wastewater and converting it into drinking water.

What percent of my Iodine-131 sample will be left after 7 half-lives?

A 58.0 kg snow skier is on the top of 351 m high hill. After she has gone down a vertical distance of 142 m, what is her mechanical energy? Explain your answer (CER) !

A sphere has a mass of 2.10kg and travels along a horizontal plane at the velocity of 12.2m/s. Find the energy

What is the force required to accelerate a baseball with a mass of 0.145 kilograms and an acceleration of 35.00 meters/second squared?

A 4.00 kg stone is dropped from a height of 145 m. What is the stone's potential and kinetic energy respectively when it is 50.0 m from the ground?