Recent content by Rowie25

I got something like .437 meters and changed that into 43.7 centimeters. Does that seem right?

Homework Statement How far (in cm) apart must be proton from group of 13 protons if the magnitude of the electrostatic force acting on either one due to the others is equal to the magnitude of the gravitational force on a proton at Earth's surface? So, I know that the mass of a proton is...

Oh right right! I thought you wrote diameter. My bad! Thank you sooo much! :biggrin:

Ohhh! Well it's actually 1/4 the length, 1/2 the diameter. So does that still make sense?

Is the resistance the same? 78 ohms? That is what I am getting but I am not sure that works.

Hmmm okay thank you! I'll try to figure it out.

I know that Resistance is voltage over current and resistivity of the material is E/J which the units are ohms *m right?

Homework Statement A certain wire has a resistance of 78 Ω. What is the resistance of a second wire, made of the same material, that is 1/4 as long and has 1/2 the diameter? I tried figuring out the equation and I ended up getting R2= 4p L1/4 divided by pi(d1/2)^2 and then I got that the...

Ohh okay thank you! I'll work on it!

Homework Statement You and your sled have a mass of 100 kg and starting from rest, slide down a very icy and frictionless road which is 20 degrees steep and 200 m long. a. What is your kinetic energy at the bottom of the hill? b. What is your net acceleration? c. How long does it take you...

Homework Statement A helicopter drops an inflatable raft to flood victims floating in a lake. When the raft is released the helicopter is 50 m directly above the victims and flying at a velocity of 10 m/s at an angle of 30 degrees below the horizontal. Neglect air resistance. a. How long is...

ahhahah! I have finals in a couple days!

Ohh okay! Thanks a lot!

Okay, thanks a lot! Wow that would be a crazy thing to see! Just one more thing, can you explain again why momentum isn't conserved for each individual object? That's the only thing I'm still a little confused on. I understand that the system of objects conserves momentum, but is the individual...

So momentum is conserved for the system of objects but not for each individual object? For number two you said the momentum of both the objects is conserved, maybe because when there is an equal but opposite momentum for both objects, the net momentum equals zero? And for number 3, is the...