A lawn rolle is rolled across a lawn by a force of 115 N, 22.5 degrees above the horizontal. If the power is 64.6W of power for 90 seconds, what is the distance.

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3