If a 20 gram bird qnd a 0.001 gram mosquito are moving at the same speed, which has a higher kinetic energy? Why?

A man of mass 80 kg runs up a flight of stairs 20 m high in 10 s. (a) how much power is used to lift the man? (b) If the man's body is 25% efficient, how much power does he expend? (c) This man consumes approximately 1.

The symbol for speed is v and the symbol for time is t. If v = 13t + 11, then what is t?

Rank the following scenarios based on the amount of work performed from largest to smallest. 1. A force of 100 N is applied to an object as it is moved 4.0 m. 2. A force of 150 N is applied to an object as it is moved 2.0 m. 3.

A pendulum is formed by taking a 2.0 kg mass and hanging it from the ceiling using a steel wire with a diameter of 1.1 mm. it is observed that the wire stretches by 0.05 mm under the weight of the mass.

A sprinter runs 50m. You are given a stopwatch. Describe how you would measure: 1. the average speed of the sprinter over the entire 50m 2. the instantaneous speed of the sprinter when he crosses the finish line

A plane is flying east at 135 m/s. The wind accelerates it at 2.18 m/s^2 directly northeast. After 18.0s, what is the magnitude of the displacement of the plane?

The same constant force, F, is applied to two blocks. The first block has a mass of M and the second block has a mass of 2M. Both blocks are initially at rest and the force acts on each of them for the same period of time, t.

Which of the following is an example of the strong nuclear force acting in an atom? A. A proton repelling a proton B. A neutron attracting a neutron C. A neutron repelling an electron D. An electron attracting a proton

Does the air in our atmosphere have mass?

Your instructor hands you a closed flask partly filled with room-temperature water. When you hold it, the heat transfer between your bare hands and the flask causes the water to boil. Quite impressive! How is this accomplished?