A car's speed changed gradually and evenly from 22 m/s to 35 m/s. It took the car 8.1 seconds to make the change in speed. On average, the car's speed changed by how much each second?

Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.

The process of a material going through a change of state from a gas to a liquid

The copper pipe has an outer diameter of 40mm and an inner diameter of 37mm. if it is attached to the wall at point a and three torques are applied as shown, determine the minimum shear stress developed in the pipe. answers should be given in units of mpa.