How fast is a 85 kg football player moving if they have a momentum of 125 kg*m/s? a
210 m/s
b
1.47 m/s
c
.68 m/s
d
40 m/s

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?

Explain why electric current cannot exist if a current doesn't have a voltage source.

A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?