A woman walks 3.30 km north and then 2.25 km east, all in 2.80 hours. (a) What is the magnitude (in km) and direction (in degrees north of east) of her displacement during the given time?
magnitude
km
direction ? north of east
(b) What is the magnitude (in km/h) and direction (in degrees north of east) of her average velocity during the given time?
magnitude? km/h
direction ? ° north of east
(c) What was her average speed (in km/h) during the same time interval?
km/h

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)

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?

Most of the volume of an atom is occupied by the