Calculate the diffusion coefficient for copper in aluminum at 700°c. pre-exponential and activation energy values for this system are 65x10 and 1 mol, respectively oa.4.6 x 10-15 m2/s ob.5.7x 102m2ts oc.3.9 x 102 m2/s d. 3.25 x 10 12m2/s

Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

Could someone me find the answer to this problem.

While you are driving in the lane next to the curb on a multi-lane road the car on your left suddenly moves toward you lane. they are about toy crash into your front fender. you