Which of the following best summarizes the law of conservation of mass? a. matter can be changed but not created or destroyed. b. matter can be destroyed during a chemical reaction. c. matter that gains mass during a chemical reaction is evidence that matter can be created.

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

The energy produced as a result of this flow of electrons from atom to atom is called

Amajor difference radio waves, visible light, and gamma rays is the of the photons, which results in different photon frequencies and wavelengths