A crane used 900 N of force to lift a load 100 m. How much work did the crane do?

An object is transported from the earth to the moon. Which statement is true about the object? The object's mass and weight both change. The object's weight changes, but its mass stays the same. The object's mass and weight stay the same.

An elements atomic number is 30. How many protons would an atom of this element have?

Which of these does NOT result in the acceleration of an object? A.) a decrease in speed B.) an increase in speed C.) a change in direction D.) maintaining a constant velocity

What is a non example of atmosphere

A scientific model doesn't need to be something physical. It can also be mathematical

If the density of the fuel is 0.821 g/ml, what mass of fuel has the airplane taken on?

Which of the following is not true of the seasons? A. The Earth is closer to the sun during the summer and farther away from the sun during the winter. B. The seasons are caused the tilt of the Earth on its axis. C.

The presently accepted value of the hubble constant gives an age of

why do you think people had a hard time accepting the idea of gravity as a force that keeps planets in their orbits?

If a hot-air balloon hovers at a fixed altitude the net weight of the balloon must be