If a weightlifter used 1,200 newtons of force to lift a barbell to a height of 2.5 meters in 3 seconds, how much work did he do? a. 500 j b. 1,000 j c. 3,000 j d. 3,600 j

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

If a simple machine reduces the strength of a force, what must be increased?

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.