What is the primary role of the respiratory system in living organisms?

A. to make carbon dioxide

B. to obtain oxygen

C. to use up nitrogen

D. to find hydrogen

Tools to use to find volume of regular shape

What are the characters associated with light as a wave

If she wants to bike 220 km, how long (in hours) must she ride? a cyclist rides at an average speed of 25 miles per hour.

At a certain location, the horizontal component of the earth's magnetic field is 2.5 * 10-5 T, due north. A proton moves eastward with just the right speed for the magnetic force on it to balance its weight. Find the speed of the proton.

Which is the fundamental law of energy?

Why did the chicken cross the road.

A 98.1 kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.69 rad/s. A monkey drops a 9.29 kg bunch of bananas vertically onto the platform.

7. A type of non-renewable energy would be: O wind O petroleum O water solar

A refrigerator is a system. The energy input into the refrigerator system (in the form of electricity) is the same as the amount of energy output from the system. Which of the following best describes the energy output of the system?

A 1,120 kg car is travelling with a speed of 40 m/s. Find its energy.