Explain why the books will not slide down the ramps at the same speed.

a. the sandpaper ramp will have more friction than the wood ramp.

b. the book on the wood ramp has more gravity pulling on it.

c. the wood ramp will have more friction then the sandpaper ramp.

d. the sandpaper ramp is higher than the wood ramp.

explain why you choose the answer you did.

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.

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?