A lever with an input arm of 2 meters high has a mechanical advantage of 4 what is the output arm's length

What is the difference between "exercise" and "physical activity"?

Explain how our eyes detect different wavelengths of visible light

Why might an electromagnet be used to pick up old cars in junk yard?

Which change in state requires that energy be added to the substance Freezing deposition Condensing Vaporizing

What types of matter can sound travle through?

If an ant were scaled up to the size of an elephant, the ant would be

A 4.0 kg food pack was dropped from a height of 200 m by a helicopter during flood relief operations. At what velocity will the food pack be falling halfway to the ground?

The sun generates both mechanical and electromagnetic waves. Which statement about those waves is true? The mechanical waves reach Earth, while the electromagnetic waves do not.

A 3-kg mass is in free fall. What is the velocity of the mass after 7 seconds?

How does the role of blood protect the body