Which material has more specific heat?

Area around a charged object where the objects can exert a force on another charged objects is an electric

Which of these is the best way to manage a natural resource

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2.