. If the Earth was the size of a basketball, about 24 centimeters in diameter, about how thick is the Earth’s crust?

the entire thickness of the ball’s diameter

the thickness of the leather covering and another inch (or 2.5 centimeters) below that

the thickness of the leather covering

6 centimeters thick, or half the radius

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?