Which of the following situations would cause light to refract? a. traveling through a vacuum b. passing from one glass block to another c. moving through the air d. moving from air to water

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?