Okay, the question I'm suppose to answer is:
If the attenuation coefficent of Al is 1.73/cm for soft-xrays, what percentage of X-rays penetrate a piece of lead 3.00mm in thickness
.
.
.
What I seem to have is
I = Io*e^(-ux)
I believe u = 1.73/cm and x = 3.00mm.
My 3...
A transport plane has two gliders tied behind it. The max force allowable on the tow rope is 12000N. The mass of each glider is 700kg. A velocity of 40 m/s is required to take off. What is the minimum runway space required.
The solution I have arrived at doesn't seem correct, hopefully...
I personally don't care if the last 2 meters of the car is in the intersection when the light turns red, however, the problem in the textbook stated that it had to clear the intersection before it turned red.
Thanks for the review of the problem, I looked at it for while and started...
I believe at this point I am just confusing myself.
A car is approaching an intersection at a velocity of 20 m/s. When the car is 50 meters from the intersection the light turns yellow. The light will remain yellow for 3 seconds. The intersection is 20 meters in width. The driver can either...