Arock falls of a cliff and hits the ground after 3 seconds. what is it’s velocity right before it hits the ground? a.0.31 m/s b.3.3 m/s c.9.8 m/s d.29.4 m/s

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

When a pair of 10-n forces act on a box of candy, the net force on the box is a 20 n. b about 14 n. c zero. d any of the above depending on the directions of forces.

Madison lives near the ocean. she’s formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals. if madison plans to test this hypothesis, she will have to deal with the following variables in her experiment: dependent variable: independent variable: one possible confounding variable: