If we changed our speed limit signs to metric, what would probably replace 55 mi/h? ( round your answer to the nearest 1 km/h.)

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?

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?