Recent content by rdn98

A committee of 50 politicians is to be chosen from among our 100 senators. If the selection is done at random, what is the probability that each state will be represented? My friend tried to help me out, and this is what he came up with. Since there are 2 senators from each state, you...

I have included a picture. Question: What is the force on each wire if B = 1.656T, i = 10A, L1 = 7cm and L2 = 14cm? Now, I have checked my physics book, and the equation I have found is F_12 = mu_0*L*I1*I2/(2*pi*D) where D is the distance between the two wires, and L is the length of...

I love it how people ask me these questions, and yet, I do not even know if I have the right answer. Ok, I have the net sigma charge for the 2nd slab, and I need to break it up into two individual parts, sigma_a and sigma_b, where 'a' is left side of slab2, and 'b' is right side of slab 2...

An infinite nonconducting sheet of charge, oriented perpendicular to the x-axis, passes through x = 0. It has area density s1 = -3 µC/m2. A thick, infinite conducting slab, also oriented perpendicular to the x-axis, occupies the region between x = a and x = b, where a = 3 cm and b = 4 cm. The...

Ok, I know what's up...just because its iscoceles triangle, it doesn't mean you have 70 degree angles. Just do inv tan of .14/.07 to get 63.4 degrees, and then the x-components will work out.

The length of a metal rod is measured to be 20.08 cm using a steel ruler when both the rod and the ruler are at 22oC. Both the rod and the ruler are raised to a temperature of 253oC. When the rod is measured at this higher temperature, its length is found to be 20.32 cm. **** a) What is the...

A single 50g ice cube is dropped into a thermally insulated container holding 200g of water. The water is initially at 25oC and the ice is initially at -15oC. ********** a) What is the final temperature of the system after is has come to thermal equilibrium ? b) Now let's drop a second...

A uniform meter stick is hung at its center from a thin wire. It is twisted and oscillates with a period of 5 s. The meter stick is then sawed off to a length of 0.76 m, rebalanced at its center, and set into oscillation. ****************** With what period does it now oscillate? Ok, I...

Picture is included. You are working as a summer intern for the Illinois Department of Natural Resources (DNR) and are assigned to some initial work on water resources project. The department will be overseeing the construction of a dam to create a large fresh water lake that will be...

A 1700 kg satellite is orbitting the Earth in a circular orbit with an altitude of 1800 km. a) How much energy does it take just to get it to this altitude? . . . Ok, I just need help getting the setup on this first part. The amount of energy need to get to this altitude would the...

Deep in space, two small asteroids wind up stationary, 1.7 km apart. Asteroid Fred has a mass of 14900 kg and Asteroid Betty has a mass of 16400 kg. *********** a) Assuming the zero of gravitational potential energy to be when the asteroids are in contact, what is the potential energy of the...

Thank you so much man. I figured it out. Now I can rest easily.

Sorry, you lost me for a second. Are you saying setup the gravitation attaction equation equal to the centripetal force equation? So (G*Me*m)/R^2=Me*v^2/R ?

A neutron star is formed when a star has burned all its nuclear fuel and begins to collapse in upon itself. It then packs roughly the mass of our Sun into a region with the same radius as that of a small city while continuing to spin at very rapid rate. Let's say you have a neutron star with a...

Lol. Okay, I knew I had to use that equation, I should have said that earlier. I feel like I have all the pieces in front of me, but just putting it all together is the obstacle. One thing though, should I use one of those constant angular acceleration equations? Thats what I'm thinking I got...