Which one of these is a chemical change?

A.) Melting Ice

B.) Making powdered juice

C.) Cutting paper

D.) Burning a log

What happens to an earthquake's S-waves when they strike the core? A) They bounce off B) They are absorbed C) The change into P-waves D) They change into L-waves

What determines how atoms combine to form molecules? A. the arrangement of electrons B. the arrangement of nucleons C. the number of protons D. all of the above E. none of the above

What is true about valence electrons? They are those electrons that are closest to the nucleus They are those electrons that are neutrally charged They are those electrons that are found in the nucleus They are those electrons that are furthest from

Heat is the transfer of thermal energy from one object to another because of its difference in A. Specific heat B. Phase C. Temperature D. Waste heat

What two quantities must stay the same in order for an object to have a constant velocity?

Given the two sets, which statement is true? A = {1, 2} B = {1, 2, 3, 4}

The net force acting on an insect falling downward at constant velocity is

Which statement best compares the accelerations of two objects in free fall? O The heavier object has a greater acceleration.

A series RCL circuit includes a resistance of 280, an inductive reactance of 508, and a capacitive reactance of 315. The current in the circuit is 0.312 A.

A ray in benzene has a critical angle of 41.8 deg when trying to enter air. What is the index of refraction for benzene?