Chris fit the pieces of a space shuttle model together.
Pieces
Completed Model
Which statement BEST describes how the pieces compare to the completed model?
O A Each piece is stronger than the completed model.
O
B. The mass of the completed model equals the mass of all the pieces.
O
C
. Each piece is made from a different material than the completed model
O
D. The mass of the completed model is more than the mass of the all the pieces

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

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.

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank