A polar bear starts at the North Pole. It travels 1 km South, then 1 km East, then
1 km North to return to its starting point.
This trip takes 0.5 h.
What was the bear’s average velocity?
Answer in units of km/h.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.

What can you increase the strength of an electromagnet by