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.

Identify some abiotic characteristics of the tundra biome.

A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.

Which is a substance that can be separated by physical means and is not the same throughout