Charlie

If a bottle has 14.96psi at 28 degrees F,what will the psi inside the bottle be if the temperature rises to 74 degress F?

I want to increase the air pressure inside a 2 liter bottle without using an air compressor. So, I want to put an empty bottle, without cap, into the freezer for a while (28degress F) and then screw the cap on it.

I assume the pressure will now be approx 15psi. If I take the bottle outside and the temperature rises to 74 degress F, how do I determine what the psi in the bottle will now be?

|a⃗ |=10 and a⃗ makes a 70 degree angle measured counter-clockwise from the +y axis in the xy plane. What is the x-component of a⃗ ?

A truck driver slams on the brakes and the velocity of the truck changes from ‹12, 0, 0 › m/s to ‹ 8, 0, 0 › m/s in 2 seconds. The truck has a mass of 12000 kg. Compute the (average) net force exerted on the truck by the surroundings.

What is the x component of the net force (in Newtons)?

I did:

Fn = ma ………m = 12000kg……….a = (8 – 12)/2…= -2

Fn = (12000kg)(-2m/s2)

Am I correct so far? Where do I go from here?

Is there a reliable site where I can download windows 7. I have two computers running windows 7, and I have tried multiple times to make a set of backup dvd's. The first dvd will be fine, and then the next will fail the chksum. It would a lot easier if I could just download the iso. I already have the product keys from my computers. Would a bit-torrent be best? Which one?