Practice it) in a crash test, a car of mass 1.53 103 kg collides with a wall and rebounds as shown in the figure. the initial and final velocities of the car are vi = -14.7 m/s and vf = 2.65 m/s, respectively. if the collision lasts for 0.142 s, find (a) the impulse delivered to the car due to the collision and (b) the size of and direction ('+' or '−') of the average force exerted on the car.

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?

Apiece of metal 75g at 110°c is dropped in a container with 500g at 20°c. the h2o if temperature is 24°c find specific heat capacity of metal

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.