Two cars are moving. The first car has twice the mass of the second car but only half as much kinetic energy. When both cars increase their speed by 6.11 m/s, they then have the same kinetic energy. Calculate the original speeds of the two cars. first car
second car

What happens to light waves from a star as the star moves away from earth?

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.

Sound is a disturbance that travels through a medium as a