The peripheral speed of the tooth of a 10-in.-diameter circular saw blade is 170 ft/s when the power to the saw is turned off. The speed of the tooth decreases at a constant rate, and the blade comes to rest in 11 s. Determine the time at which the total acceleration of the tooth is 130 ft/s2.

Why is there friction between objects

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Select the three ways that the parallel-plate capacitor differs from a car battery.