Adriver increases his velocity from 20 km/hr to 100 km/hr. by what factor does he increase the kinetic energy of the car with this increase in speed? kinetic energy is 4 times greater
kinetic energy is 16 times greater
kinetic energy is 25 times greater
kinetic energy is 9 times greater
kinetic energy is 2 times greater

The “death throes” of stars are amongst the most complex phenomena in all of astronomy, and the “corpses” of stars amongst the most energetic and exotic objects in existence. beginning at the end of the core helium fusion stage in a star’s life, describe in detail the post-main sequence development of both (a) a 1.0 solar mass star, and (b) a 25.0 solar mass star. in what significant ways do they differ? what role does each of these types of stars play in the "star-gas-star" cycle and the evolution of chemical elements in our galaxy?

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?