What has to happen for momentum to be conserved

A pure substance that cannot be broken down into any other substances by chemical or physical means is a (n)

a silver ingot has a volume of 53.6 cm and weighs 500g. what is the desity in grams per cubic centimeter.

A crane lifts a 35,00-N steel grinder a distance of 25m in 45s. How much power did the crane require to life the grinder? Write your answer in Kilowatts.

A man pushes a lawn mower on a level lawn with a force of 250N. If 40% of this force is directed downward, how much work is done in joules by the man in pushing the mower 6.2 m?

A triangular plate made of homogeneous material has a constant thickness that is very small. if it is folded over as shown, determine the location z¯ of the plate's center of gravity g.

Why is mass movement more common after a heavy rainfall?

Order the colors of the rainbow starting with the color that is bent the least to the color that is bent the most (when it passes through a prism). Question 1 options: yellow blue indigo orange green red violet

Find the unit vector that has the same direction as the vector v = _12j

Why isn't the size of something considered a physical property?

A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than the other. He fires a gun and, after a while, hears three echoes. The second echo arrives 1.