Which statement best answers the question, "why is copper a good conductor of electricity? "? (2 points) copper atoms have a loosely held electron in their outer shell that is able to move freely to other atoms. copper atoms are tightly bound and are able to work with other copper atoms to exchange electrical charges. copper has an equal number of protons and electrons making the flow of current possible. copper's outer shell electrons are not balanced and must join with other copper atoms in order to be stable.

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above

Which transition by an electron will release the greatest amount of energy? oa ob oc od