Recent content by bkl4life

I have never done a problem like this. In class we are given the total resistance or a drawing. I'm not sure what to do when I am given the total resistance and have to find the two resistors. For parallel: 150=1/r1+1/r2 Would I get the same answer for the two resistors. To solve for...

Equivalent resistance here means total... I think. The question seems easy and yet I can't do it.

Homework Statement Two resistors, R1 and R2, have an equivalent resistance of 710 ohms when they are connected in series and an equivalent resistance of 200 ohms when they are connected in parallel. a) what are R1 and R2 b) Determine the current traveling through the resistors when they...

So would this be accurate to say: The leather resists the flow of electric current. Leather cannot break down electrons. A free charge being accelerated by the electrical field will have enough energy to knock electrons from any atom it strikes. These electrons are accelerated and becomes...

Homework Statement Lighting strike: Storm clouds build up large negative charges that dwell in a charge center. Suppose a storm cloud has -25 C in a charge center located 10 km above the ground. The negative charge center attracts an equal amount of positive charge that is spread on the...

Electrons move and you feel a shock. Is that the same with the belt. It is moving along metal so the electrons are being transferred which causes sparks? That doesn't seem right.

My book says: U=q'*V U=electric potential energy V= electric potential q'= charge It also says that: V=U/q'= K(q/r) Would I be able to do: 2*(8.99*10^9)(charge)/.038= 4.5 mJ

I was using the charge of an electron. I was looking at part b when I used those numbers. Should I use the 4.5 mj instead of the charge of electron? The total potential of a system is the sum of all the contributions for each pair of particles. I'm just lost.

Homework Statement Explain why large sparks are often seen jumping from leather belts driving machinery. Homework Equations The Attempt at a Solution I know metal chains are off trucks to stop electric static but I'm not sure why leather. Is leather a conductor?

I think it's the amount of work needed to separate the charges. (9 x 10^9)*(1.6*10^-19)*(-1.6*10^-19)/.038 = -6.06 *10^-27 When does the 4.5 mJ come into play

Homework Statement The potential energy of a system consisting of two identical charges is 4.5 mJ when their separation is 38 mm. a) What is the magnitude of each charge? b) How many individual charges are present in the system? (You can assume the charges are either electrons or...

Never mind, I saw what I did wrong!

Homework Statement A dancer spinning at 72 rpm about an axis through her center with her arms outstretched. The distribution of mass in a human body is Head: 7% Arms 13% Trunk and legs: 80% Using your own measurements on your body calculate your a) moment of inertia about your spin b)...

Awesome! Thanks!

I'm not even sure what a lettuce spinner is. Maybe that's the problem. I know you fill it up with water and you lift the bowl up and the water will exit through the wholes. The lid has a spinner on it which allows you to get rid of any extra water. This could work because of circular...