Kepler discovered that planets move faster when they are closer to the sun. Which scientist discovered the reason they move faster?

a. Brahe

b. Copernicus

c. Newton

d. Ptolemy

F a girl is standing in front of a smooth surface from which a sound is reflected, the girl may hear

Match each figure with his contribution to art criticism. Roger Fry was ? the first famous art critic. John Berger was ? the father of modern art criticism.

Fitness can be achieved only through A. frequency. B. accuracy. C. resistance. D. endurance.

Potential energy: Select one: a. is stored energy unavailable to do work. b. transfers motion to matter. c. is contained in matter placed in certain positions or arrangements. d. contains less energy than kinetic energy. e.

The gas used to fill party ballons contain only helium atoms. This make helium a (n).

A potter's wheel of radius 16 cm starts from rest and rotates with constant angular acceleration until at the end of 32 s it is moving with angular velocity of 10 rad/s. what is the angular acceleration? answer in units of rad/s 2.

The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0∘ above the horizontal, some of the tiny critters have reached a maximum height of 58.7 cm above the level ground.

Design an experiment (Fair Test) to find out what would be a good insulator for a dog house.

Which of these changes does a submarine encounter as it returns from the bottom of the ocean to the surface of the ocean? a. the amount of sunlight increases. b. the water temperature decreases. c. the amount of plants decreases. d.

Why do some elements have symbols that don't use letters in the element's name?