Recent content by dlilpyro

Alright I think I have it now. Thanks for all the help.

I'm not sure what the additional term is because we didn't have time to get the equation during class today. But if the initial velocity is zero how can you solve for v final on the left side?

Yes so is this the right way to set up the equation for the second part: (50)(v)=(.001)(150) v=-.003 m/s - v is negative because moving backwards I'm not sure if 50 kg is the right mass though. I took it as the girl and the gun becoming one system so their masses are added.

Kim holds a 2.0 kg air rifle loosely and fires a bullet of mass 1.0 g. The muzzle velocity of the bullet is 150 m/s. What is the recoil spped of the rifle? The next shot the girl holds the rifle tightly against her body. Calculate the new recoil speed assuming the girl has a mass of 48kg. I'm...

I need some help with this problem. I can find the acceleration, just not the tension force. The mew kinetic is .6. The mass on the table is 10 kg and the mass hanging on the pulley is 20 kg. Thanks a ton.

I need some help with this problem. A ball of mass m is suspended from 2 strings of unequal length. The tensions in T1 and T2 in the strings must satisfy which of the following relations? The answer is T1<T2. I can't get a lucite in but T1 is on the left and sloping down to the right on an...

Anyone?

Thank you for your answers. I am thinking of making a fuel cell for a school project with water as the fuel. Could anyone comment on whether or not this would work and why not? I was thinking of using electrolysis to separate the H2 and the O and then use the subsequent O2 molecules as well as...

How do individual oxygen atoms combine to form the O2 molecule? Can it be done with heat?

Anyone else want to share their recomendations?

I'm currently reading A Brief History of Time, however, it is slightly outdated. Are there any recently released physics books that you would recommend? Perhaps a book that would discuss the LHC and topics such as that.

Anyone?

What would be the best book to teach myself physics? I'm currently a sophomore in high school and am taking trig this year and pre-calc next year. I'm also taking physics honors next year. However, I would like to get a jump on this course and eventually try to move into quantum mechanics on my...