Multiplying a vector with another vector results in what type of answer. A) a direction
B) a vector
C) either a vector or a scalar
D) a scalar

Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine

In a system, when potential energy decreases, then entropy also decreases. true false

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?