Which of kepler's laws describes the speed at which planets travel at different points in their orbit around the sun?

a) the law of gravity
b) the law of periods
c) the law of ellipses
d) the law of equal area and equal time

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.