Can someone plz hel A car of mass 500Kg is travelling at a speed of 4m/s. This car collides and sticks with a car of mass 500kg which is stopped in a tragic light what is the final speed of the two cars after the collision.
A:2
B:1.5
C:3.0
D:1.0

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion