What is the use of infrared rays?

Which type of simple machine reduces the amount of input force needed?

If a box has a mass of 300 kg, what is its weight on Earth?

What holds a moon in its orbit? A. the heat generated by the planet it orbits B. the gravitational pull of the star it orbits C. its own internal magnetism D. the gravitational pull of the planet it orbits

A conductor is placed in a steady external electric field. Which of the following statements are correct for this situation? (There could be more than one correct choice.) Check all that apply. Check all that apply.

If you have one pencil and that pencil shoots lasers out of its mouth then an dog comes and tells you the future and that you shouldn't vote for Bush again and then the dog ate the pencil and exploded and the alien comes and takes you away to his

Forgetting takes place only in short-term memory.

What is the simplest relationship between the angular wavenumber k and just one of the other kinematic variables? Express your answer using only one of the other kinematic variables plus constants like π.

The pilot of an airplane notes that the compass indicates heading west. The airplane's speed relative to the air is 100 km/h. The air is moving in a wind at 25.0 km/h toward the north.

How do you get a resultant factor? A. Add two or more vectors B. Add two scalars C. Multiply two scalars D. Multiply two vectors

A panpipe is made of five pipes. The longest pipe is 25 centimeters long and the shortest is 5 centimeters long. Which of these pipe produces the highest-frequency sound and why?