Sunscreen protects your skin from sunburn. For sunscreen to be effective, it must block or absorb A. X rays. B. visible light. C. infrared light. D. ultraviolet light.

Bright sunlight is reflected from an icy pond. You look at the glare of the reflected light through polarized glasses. When you take the glasses off, rotate them 90∘, and look through one of the lenses again, the light you see becomes brighter.

3. If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth?

Question 1 A car is moving with a positive acceleration. Which of the following accurately depicts the direction of its velocity?

How does the direction of acceleration compare with the direction of the net force that produces it

When discussing engines, the ratio of output work to input work expressed as a percentage is called

What is ___ heating of a liquid__ gas to liquid

A gate in an irrigation canal is constructed in the form of a trapezoid 2 m wide at the bottom, 38 m wide at the top, and 2 m high. It is placed vertically in the canal so that the water just covers the gate.

A machine with a mechanical advantage of 10 is used to produce an output force of 250 newtons. What input force is applied to this machine

Why do you float in space

How does physical change affect the identity of a substance