An astronaut in outer space holds a 2.0 kg wrench in their hand. The astronaut and the wrench are initially at rest with respect to one another. The wrench is then thrown (ignoring any rotational effects) and an observing astronaut measures each body’s velocity following the throw. The wrench moves with a velocity of +8.0 m/s while the astronaut moves at -0.15 m/s. Calculate the mass of the astronaut.

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)

There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. what is the maximum road grade that your fully loaded ecv can climb?

The air that we breath is made mostly of which gaseous molecule