Heather hits a tennis ball upward with an initial speed of 32 feet per second. after how many seconds does the ball hit the ground? use the formula h = rt - 16t^2 where h represents height in feet and r represents the initial speed.

What are similarities and differences of reflection, refraction, diffraction and absorption?

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation