Iso 7. Joe Citizen is cruising in his car toward a green light at 72 kilometers/hour. At
34 meters from the intersection he jams on his brakes. (There is an obstruction in
the intersection. Why, it's.. it..the BATMOBILE, stopped to help some poor
pedestrian in trouble!) If Joe. can decelerate at 6 m/sec?, how long will take him
to stop? How far does he travel in this time? Is there a crash with the
BATMOBILE?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Carbon is allowed to diffuse through a steel plate 15 mm thick. the concentrations of carbon at the two faces are 0.65 and 0.30 kg c/m^3 fe, which are maintained constant. if the preexponential and activation energy are 6.2 x 10-7 m2 /s and 80,000 j/mol, respectively, compute the temperature at which the diffusion flux is 1.43 x 10^-9 kg/m^2 -s.

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?