A 1000 pound elevator falls at a rate of 9.8m/s/s for 3 seconds, what is the final rate or speed of the elevator?

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.

Explain the consequences of this addiction to the brain tissue

The softest and hardest minerals are: softest hardest