If a car averages 40 mph for 6 hours and then speeds up to average 50 mph for 3 hours

In a closed system, the total energy prior to an energy transformation is the total energy after. a. equal to b. unrelated to c. greater than d. less than

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th