Motor 1 and motor 2 each lift objects of equal weight. They both have the same power rating but motor 2 lifts the weight faster. Which motor is more efficient?

Motor 1

Or

Motor 2

What do the four terrestrial planets have in common? a. they all revolve about the sun in the same direction. b. they are all the same size. c. they all have identical orbital shapes. d. they all have the same aphelion distances?

Objects 1 and 2 attract each other with a gravitational force of 72.0 units. If the distance separating Objects 1 and 2 is changed to one-third the original value, then the new gravitational force will be units

A certain substance has a heat of vaporization of 37.51 kJ / mol. At what Kelvin temperature will the vapor pressure be 3.50 times higher than it was at 307 K?

If 48 cm of brick and 15 cm of fiberglass have the same R value, then ... both materials have the same density both materials have the same insulating ability both materials have the same conducting ability both materials have the same mass

As scientists learn more what happens to scientific ideas?

Explain Newton's First Law for the following. If you walk across the room holding a ball, when should you drop it to ensure that it lands on a target? Before, after or when you are directly on the target?

In what way are all forms of potential energy the same?

Enise is riding her bike and falls to the ground. During the collision, she hits both grass and cement. Which best explains why Denise had fewer injuries to the area of her body that hit the grass?

A rock is dropped into the Grand Canyon. It takes 18 seconds to hit the bottom. Calculate how deep the canyon is.

A change from one form of energy into another is called a. gravitational potential energy. b. work. c. conservation of energy. d. an energy transformation