How does a tree get energy? A. It does not need energy
B. It gets energy from the Sun.
C. It eats food in its environment.

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5

Agust of wind blowing east pushes against a ball. when will the wind do work on the ball? when the ball moves to the east when the ball moves to the north when the ball stays in one place when the ball moves north or south

Amethod of separation that employs a system with two phases of matter, a mobile phase and a stationary phase, is called