Who used scientific investigations to study atoms? Check all that apply. Dalton
Democritus
Rutherford
Thomson

Answers: Dalton, Rutherford, and Thomson.
(A, C, D on edge 2021)

Which statement best describes the function of enzymes?

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added