How can two objects have different mass and volume yet have the same density?

Suppose that at room temperature, a certain aluminum bar is 1.0000 m long. The bar gets longer when its temperature is raised. The length l of the bar obeys the following relation: l=1.0000+2.

During a circus performance, a 71.2-kg human cannonball is shot out of an 18.0-m-long cannon. If the human cannonball spends 0.785 s in the cannon, determine the average net force exerted on him in the barrel of the cannon.

What does this graph show about the acceleration of the moving object? the acceleration is constant the object is not accelerating the acceleration is decreasing the acceleration is increasing

If you were suddenly placed at an altitude of 100 kilometers (62 miles) above the earth, would you expect your stomach to expand or contract? explain why.

A golf ball is struck with a velocity of 80 ft/s as shown. Determine the speed at which it strikes the ground at b and the time of flight from a to b

0 cm3 of gasoline are mixed with 66 cm3 of water. what is the average density of the mixture

If the mass of an object is 6 kg and its momentum is 72 kgm/s, what is its velocity? A. 18 m/s B. 12 m/s C. 9 m/s D. 72 m/s

Which of the following are not units of frequency: Hertz. m/s. waves/s

The efficency of a practical machine is less than 100% why?

Jill can use a force of 12N to lift a single box up 5m. How many of these boxes must she lift in a minute to use 60 watts of power?