A gardener uses 1600 J of work to push a wheelbarrow for 45 seconds. How much power does she use?
O A. 35.6 W
O B. 69.7 W
O C. 29.2 W
O D. 43.8 W

Help please

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.