A force of 13.1 N changes the momentum of a moving object by 10.9 kg·m/s. Using the impulse equation, calculate how long the force acted on the mass. Write your answer to two decimal places.

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