The refractive index of light going from air to glass is 1.5, what will be the refractive index of light going from glass to air

Using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

In which of the following is positive work done by a person on a suitcase