# Urgent help with Questions regarding Gen. Physics

1. Nov 20, 2007

Okay i know that
L = Iw and L = r x p
I can use equation of motion to find W.and I=wrp2
but how will that get me to the answer? i have tried everything and the answer i get everytime is 12 or 18.. Both of them are not one of the choices. I have a test tonight and have to go to work right before the test so if anyone of you can please help me.
I would really appreciate it.

Another question i needed help with is

So what i thaught on this question was to take the earth's mass and diameter to be 1
so the mass of venus would be
Mass(venus)=0.0558xMass(earth)
Mass(venus)/Mass(earth)=0.0558

is this the correct aproach? i got the right answer at the end and just want to know if i was doing it right?

2. Nov 20, 2007

### Staff: Mentor

3. Nov 20, 2007

### wysard

Are you sure that's VENUS? The numbers look suspiciously like the relative mass and diameter of MERCURY to me. Could be just a typical textbook typo. Just an observation, has no bearing on the info Astronuc already provided to solve the problem at hand.