the five competitive forces model suggests the threat from potential entrants affects industry competition. how might an existing firm deter entry of new firms?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Asystematic approach to problem solving is called a (an)

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?