8. The position of a vehicle moving on a straight track along the x-axis is given by the equation x(t) = P + 3t+ 5, where x is in meters and t is in seconds. What is its acceleration at time t = 5 s? A) Zero B) 2 m/s2 C) 5 m/s2 D) 10 m/s2 E) 13 m/s2 along the w-axis is​

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.