A tennis ball has a mass of 1 kilograms. A basketball has the mass of 4 kilograms. Sarah uses the same amount of force to throw each ball, using a force of 40 Newtons. Based on this information, which of the following statement is true?

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton