Between which pair of objects would the largest gravitational attraction be found? assume there is an equal distance between the first and second items mentioned in all four answer choices.

a. an ant and the earth
b. a person and the earth
c. a person and a small bird
b. a small bird and the earth

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.

The consumption of fossil fuels could be

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.