What are the components of earths life support system

You sit "at rest" in front of your computer to answer this question. But you sit on the surface of a planet that spins, so even while you sit "at rest," you are really hurtling through space at high speed. The average radius of the Earth is 6378 km.

If an automobile is able to travel 400 km on 47.2 l of gasoline, what is the gas mileage in miles per gallon?

Why are the horinzontal forces acting on the book balanced

Which bmi score listed below is considered over weight?

A Martian rover is descending a hill sloped at 30° with the horizontal. It travels with a constant velocity of 2 meters/second. Calculate its horizontal velocity.

Which of the following statements is true regarding the use of refrigerants? a. if your equipment is recovery only, refrigerant that is removed from vehicles should be poured down the drain b.

When would the velocity of a wave traveling in a medium change? A - only if a property of the wave changes B - only if a property of the medium changes C - if a property of both the wave and the medium changes D - never

If the moon did not have an atmosphere what would happen to it

a 2.0 kg mass moving to the east at a speed of 4.0 m/s collides head-on in a perfectly inelastic collision with a stationary 2.0 kg mass. how much kinetic energy is lost during

How did people years ago find out which side of a magnet was north and which was south?