5. Two students are sitting next to each other on chairs with wheels. The boy has a mass 75 kg, and the girl has a mass of 50 kg. They push each other and separate in opposite
directions. This causes the boy to move at 2 m/s. How fast and in what direction is the girl
moving? Is this an elastic or inelastic collision?

Sara is creating an experiment. her hypothesis states the following. if i increase the air in my tires, then i will get better gas mileage. if this is her hypothesis what column titles do we need in our date table? a. air pressure in tire (psi) and gas mileage (mph) b. air pressure in the atmosphere (psi) and gas mileage (mph) c. miles (m) and gallons per mile (g) d. old battery and new battery

The arrival of in the early days of europa’s existence could have formed its ocean. it is likely that the water experienced similar to earth. it is also possible that this water is retained beneath europa’s surface and in its atmosphere due to europa’s . 1.) a. precipitation b. water vapor c. icy debris 2.) a. gravitational compression b. biochemical cycling c. radiogenic heating 3.) a, gravity b. magnetic field c. heat energy for plato

Positrons are spontaneously emitted from the nuclei of