A weight lifter bench‑presses a 150.0 kg 150.0 kg barbell from his chest to a height equal the length of his arms, 0.850 m. 0.850 m. How much work does he do?

Which scientist first suggested that the sun was at the center of the solar system

Consider the following objects and their locations. Object a 2-kg object 5 cm above the floor Object b 2-kg object 120 cm above the floor Object c 3-kg object 120 cm above the floor Object d 3-kg object 80 cm above the floor (i) Rank the

A toy floats in a swimming pool. The buoyant force exerted on the toy depends on the volume of none of these choices. all the water in the pool. the toy under water. the pool.

A 40 kg dog is sitting on top of a hillside and has a potential energy of 1,568 J. What is the height of the hillside? (Formula: PE = mgh) 3.9 m 4.0 m 39.2 m 40.0 m

Why are some pots and pans designed with wooden handles? A. Wood is a conductor. B. Wood has a high heat capacity. C. Wood is an insulator. D. Wood is an organic substance.

A rock is dropped into the Grand Canyon. It takes 18 seconds to hit the bottom. Calculate how deep the canyon is.

A change from one form of energy into another is called a. gravitational potential energy. b. work. c. conservation of energy. d. an energy transformation

4. An airplane must achieve a velocity of 71 m/s for takeoff. If the runway is 1000 m long, what must the acceleration be?

As the average kinetic energy of the particles in a gas increases, which of the following occurs?

Power=170 watts time=20 seconds