During a car crash at a speed of 30 m/s, a driver with a mass of 60 kg is safely brought to a stop by an airbag in 0.5 seconds. How much force did the airbag absorb?​

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.