The ground state electron configuration of sn2+

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?