What is the basic functions of the blood in the cardiovascular system

You are on a school bus driving north at 20 m/s. You walk toward the back of the bus with a velocity of 6 m/s. What is your velocity relative to the road?

3. As the duration of a maximal effort increases from 10 seconds or less to between 10 and 180 seconds, what factor becomes limiting in terms of energy production?

A raft with the area A, thickness = h and the mass 600 kg, Floats in still water with 7 cm under the water surface. When Bubba stands on the raft it sinks down further in the water so the raft is 8.4 cm under the water surface.

How long does it take to. travel 500 miles in. a car at 75mph?

A box weighing 40.0 N, is initially at rest on a rough 6.0 m long ramp. The ramp is inclined at 30.0° with the horizontal. As the box slides down the ramp it experiences a frictional force of 6.0 N against its motion.

What is the formula for calculating mechanical power

The ability to do work is called what?

How can the speed of a mechanical wave energy be calculated

A hollow sphere of negligible mass and radius R is completely filled with a liquid so that its density is rho. You now enlarge the sphere so its radius is 2R and completely fill it with the same liquid. What is the density of the enlarged sphere?

Assume that you stay on the Earth's surface. What is the ratio of the sun's gravitational force on you to the earth's gravitational force on you? Express your answer using two significant figures.