1. How did the movement of sunspots on the surface of the sun affect people's' beliefs about astronomy at the time? A. The movement of sunspots showed that the sun was a perfect sphere with a perfect surface as people had believed.

B. The movement of sunspots proved that the sun rotated and that it was at the center of the solar system.

C. The movement of sunspots led people to believe that Earth traveled in space in a circle.

D. The movement of sunspots showed that scientists needed telescopes powerful enough to track these changes.

Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

What are the theoretical properties of a gas at a temperature of 0 kelvin?

When temperature of a substance increases, of its particles increase resulting in more between particles. real world applications of thermal expansion absolute zero (-273 degrees c) is the lowest possible temperature on the kelvin scale. it is a measure of where a substance has no kinetic energy. heat is a process of the . energy flows spontaneously from a object to a until equilibrium is reached. heat is measured in heat is transferred throughis a method of heat transfer that occurs between particles of matter that are in direct contact with each other. are poor conductors that impede / reduce the rate of heat transfer. is a method of heat transfer that occurs in fluids (non-solids) by means of currents. real world application of convectiona method of heat transfer through electromagnetic waves. when energy moves from one object to another inside a closed system, no energy is or in the system in the transaction. systems will spontaneously move to a state of organized energy or high disorder over time called