A wave has a speed of 30 m/s and a wavelength of 3 meters. Calculate its frequency.

How many electrons do all halogen atoms need to fill their outer energy level?

How does friction affect forward motion give an example

What are the products of the combustion of a hydrocarbon? carbon and oxygen carbon dioxide and water carbon and hydrogen carbon dioxide and hydrogen

Which material would you take, steel or bricks to design a bridge? Why?

Which of these could NOT be used to find the mechanical advantage of an inclined plane? Select one: a. length and height of inclined plane b. output force c. percent effieciency d. input force

A car travels 35.0 mph north for 1.00 hour, then 40.0 mph east for 0.0500 hour, and finally 50.0 mph northeast for 2.00 hours. Calculate the average speed.

A 500 lb steel beam is lifted up by a crane to a height of 100 ft and is held there. A) How much work is being done to hold the beam in place? B) How much work was done to lift the beam?

If Light is shone through the slits of a card onto a sheet of white paper describe what is seen.

When you break a magnet in half, how many poles does each piece have? Explain.

What can you use to unscrew a tiny screw?