Achild rides her bike at a rate of 12.0 km/hr down the street. a squirrel suddenly runs in front of her so she applies the brakes and slows to 8.0 km/hr in 0.25 sec. what is the acceleration of the bike rider during this period?

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

Which describes increasing the efficiency of energy resource

What happens when the number of protons in an atom changes