Recent content by DoctorB2B

Homework Statement I am given isobutane as my starting material, Br2 and benzoyl peroxide as my radical initiators. My final product is the isobutane with Br attached instead of H. I have to design the mechanism. I have tried what seems like an endless combination of mechanism attempts...

Thanks for all your help!

J=delta p I wasn't sure where to start because I'm dealing with two objects moving at different speeds. I think I'm suppose to be dealing with initial and final velocities, however I don't know which initial velocity I would use since this is an inelastic collision.

Homework Statement Block A (2.1kg) is moving at 7.8 m/s to the right and collides head on with block B (3.4kg), which is moving at 4.2 m/s to the left. a) What is the velocity (magnitude and direction) of the blocks after the collision, if the two blocks stick together? b) What is the...

am I using 6.57 and 0 as v1 and v2 respectively?

coefficient = 0.44 average acc. = (6.57m/s-0m/s)/0.76s = 8.64m/s2

k ... so it goes a little something like this then: K1 + Ugrav = K2. The mass cancels on both sides leaving (0.5vi2+gh)=0.5vf2 where the velocity at the bottom of the hill is 6.57m/s.

At the top of the hill, the block has kinetic energy and at the bottom it has potential energy due to lack of movement.

then I'm lost ... because it seems like there are variables missing. If I'm to solve for average acceleration, don't I need an angle so I can determine the length of the hill?

Okay, I think I've gotten the kinetic friction coefficient by using the formula s=v2/uk2g which gave me 0.08. I am however a tad lost when it comes to determining average acceleration.

Homework Statement A block slides down a frictionless hill, h=1.8m high. At the top of the hill the block has a speed of v=2.8m/s. At the bottom of the hill, the block travels over a patch of rough pavement and comes to a complete stop after s=5.0m distance due to friction. a) What is the...

Homework Statement What is the minimum coefficient of static friction necessary to allow a penny to rotate without sliding off a 33.5rpm record (diameter of these old-fashioned records is 0.3), when the penny is placed at the edge of the record. Ignore the size of the penny. The Attempt at...

Homework Statement A force of 85N is applied to a block on an incline that makes an angle of 35 degrees with the horizontal. The coefficient of kinetic friction between the block and the incline is \muk=0.45. The block is moving and accelerating up the incline at 1.5 m/s2. Homework...

Thank you very much ... you're the greatest!

Homework Statement Any help would be greatly appreciated! I have to use matrices to figure these out. 1. A retired couple wishes to invest $150,000, diversifying the investment in three areas: a high-risk stock with an expected rate of return of 15%, a low risk stock with an expected rate...