Which of the following is a mixture?

A. steel

B. water

C. oxygen

D. gold

Explain the statement "the lower down in the food chain we eat, the greater percentage of solar energy we put to use, and the more people Earth can support" in terms of trophic levels and pyramids of energy.

A car starting from rest accelerates at a rate of 8.0 m/s/s what is its final speed at the end of 4.0 seconds

What is "frame of reference?"

What is the region where the magnetic force will affect other magnets?

Describe Piaget's four stages of cognitive development. Include the major hallmarks of each stage.

How much work must be done on a 10 kg snowboard to increase its speed from 4 m/s to 6 m/s?

If a spacecraft that seems to be motionless in deep space is given some type of quick push, what will happen? A. The spacecraft will not move because it only works on earth. B.

A fast, white water cascade is also known as what?

What is a stack of membranes that packages chemicals

Under what condition (s) will an object be in equilibrium? Notice that equilibrium in physics has a broader definition. (A) Only if it is moving with constant velocity. (B) Only if it is at rest.