A car slows from 23.9 m/s to 9.3 m/s with a constant acceleration of -3.1 m/s2. How long in seconds does it require?

Which type of microscope would allow the viewer to see ribosomes inside a cell?

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

How long will it take a car traveling of a constant speed of 45m/s to cover the distance of a 2.5km?