A book has a mass of 5 lb what is the mass of the book kg

What one advantage of doing a field experiment instead of a laboratory experiment? A. There are no variables when you do a field experiment. B. It is easier to control variables in a field experiment. C.

How and why may a theory be discarded

This person does work to stretch the rubber band. When will the potential energy be the greatest?

A brass washer has an outside diameter of 4.50 cm with a hole of diameter 1.25 cm and is 1.50 mm thick. The density of brass is 8599 kg/m3. If you put this washer on a laboratory balance, what will it "weigh" in grams?

What is the heat source for rock formation

A child on a sled starts from rest at the top of a 15° slope. if the trip to the bottom takes 23.9 s how long is the slope? assume that frictional forces may be neglected.

Which si prefix means one one-hundredth (1/100) ?

A sled is being pulled to the left by 5 dogs with 6 newtons of force. Find the net force

Objects become electrically charged as a result of the transfer of

How many electrons do most atoms seek to have on their valence shell? Using this information, explain why certain elements are unreactive and why other elements are reactive.