What is the formula for calculating wave speed?

When you lift a book from the ground to your desk, what kind of work do you do negative or positive by lifting the book what do you change does the book gain or lose energy what kind of energy

What is the main reason why many nuclear power plants are located near bodies of water? to wash wastes out of the power plant to be close to shipping lanes for frequent fuel delivery to have easy access to a coolant for the reactor to avoid problems

A 52 N sled is pulled across a cement sidewalk at constant speed. A horizontal force of 36 N is exerted. What is the coefficient of sliding friction between the sidewalk and the metal runners of the sled? Select one: A. 0.69 B. 16 C. 1872 D. 1.44

There is a 30 g sample of Be-11. It has a half-life of about 14 seconds. How much will be left after 28 seconds? A. 3.75 g B. 7.5 g C. 15 g D. 30 g

One of the best candidates for a black hole is found in the binary system called A0620-0090. The two objects in the binary system are an orange star, V616 Monocerotis, and a compact object believed to be a black hole.

The majority of pelagic sediments are of which type? A. Terrigenous B. Biogenous C. Hydrogenous D. Cosmogenous

I can't figure this out, I could use an explanation too! A speeding truck travels in the positive x direction. It hits a car traveling in the positive y direction. The vehicles are deformed and travel together at an angle θ with the positive x-axis.

Based on your knowledge of the electromagnetic spectrum, why are radio waves considered harmless while ultraviolet waves and x-rays considered harmful?

What is great summary in physical science?

Does ice melt faster in water or air