According to the law of reflection, what is the angle of incidence? O It is the angle the incident ray makes with a line drawn perpendicular to the reflecting surface.
O It is the angle the incident ray makes with a line drawn parallel to the reflecting surface.
It is the angle the incident ray makes with a line drawn perpendicular to the viewer.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j ?

The law of conservation of energy states that energy cannot be created or , energy can be from one substance to another. the first blank is ' destroyed ' and for the second blank is ' transferred '

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.