Two cars collide with each other. Before the collision, one car (m = 1300 kg)

is going north at 30 m/s and the other car (m = 900 kg) is going south at 15

m/s. What is the momentum of the system made up of the two cars after the

collision?

Why is the sign of the emf of the second peak opposite to the sign of the first peak?

Where are waves found in nature? Sound Water Light All of the above

An objects speed is 7.20 m/s and its momentum is 360kg•m/s. what is the mass of the object

What are five agents of erosion?

Is gravity an internal force or external force?

A motorist driving at 25 meters/second decelerates to 15 meters/second. The combined mass of the vehicle and the driver is 1.5 * 10³ kilograms. What is the amount of mechanical work done by the vehicle?

All forces are different each exerts a particular type of effect on an object

Witch statement about polymers is true

Two bullets have masses of 3,0 g and 6.0g, respectively. both are fired with a speed of 40.0 m/s. Which bullet has more kinetic energy? What is the ratio of their kinetic energies

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?