You drop a rock weighing 23.2 g into a graduated cylinder that contains 55 mL. The level of the water rises to 62 ml. What is the density of the rock?

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium