What causes light rays to bend in a new medium

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