Which equation below would you use to determine the number of neutrons in a given nucleus when you are given the atomic number (z) and atomic mass (a)? n = a + z n = a/z n = az n = a – z

Astronomers discover an exoplanet (a planet of a star other than the sun) that has an orbital period of 3.87 earth years in its circular orbit around its sun, which is a star with a measured mass of 3.59 x 1030 kg. find the radius of the exoplanet's orbit.

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

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario