What causes satellites to remain in orbit above Earth? A) Satellites achieve a balance between gravity and their velocity that keeps them in orbit.

B) Satellites reach their escape velocity with the help of scientists and engineers.

C) Satellites have a circular or elliptical orbit.

D) Gravity pulls satellites sideways around Earth's curved surface.

Apositive rod is placed to the left of sphere a, and the spheres are separated. which best describes the spheres? sphere a is negative and sphere b is positive because protons from sphere a are attracted to the rod and move to sphere b. sphere a is negative and sphere b is positive because electrons from sphere b are attracted to the rod and move to sphere a. sphere a is positive and sphere b is negative because electrons from the rod move to sphere b and protons then move to sphere a. sphere a is positive and sphere b is negative because protons move from sphere b to the rod and also to sphere a.

In a closed system, the total energy prior to an energy transformation is the total energy after. a. equal to b. unrelated to c. greater than d. less than

Diamond will scratch quartz. true or false