Arotating beacon is located 15 ft from a wall. if the distance from the beacon to the point on the wall where the beacon is aimed is given by a = 15|sec (2πt)| , where t is in seconds, find a when t = 0.37 seconds. round your answer to the nearest hundredth.

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

How many neutrons does plutonium -196 with an atomic number of 78.

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?