Me answer this!
which direction will the molecules pass through the cell membrane?

a. from bottom to top
b. from left to right
c. from right to left
d. from top to bottom

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.