# Recent content by baseballer10p

1. ### Thermo Heat Exchanger Problem

Homework Statement I'm given three temperatures and four pressures for a heat exchanger. I am also given the mass flow rate, which is the same for both the inlets and outlets. There is no heat transfer between the heat exchanger and the surroundings. My task is to find the fourth...
2. ### FBD Help (Actual and Effective Loads)

1. Homework Statement Obtain the pin-forces on the vertical bar BDE at the instant shown. Supply and document any additional information that my be necessary in order for this problem to have a tractable solution. 2. Homework Equations Newton's motion equations. [I'm just trying to...
3. ### Elementary Dynamics Problem (FBD Help)

Homework Statement Obtain the pin-forces on the vertical bar BDE at the instant shown. Supply and document any additional information that my be necessary in order for this problem to have a tractable solution. (This is number 3 in the attached pdf file.) Homework Equations Newton's...
4. ### Interference from Thin Films

Ok, I got the answer, but I want to make sure. Is it x_n_ = x/n_2_ where x_n_ is the wavelength in the oil and x is the wavelength in air? n_2_ is the index of refraction of the oil or glass correct? Thanks, by the way.
5. ### Interference from Thin Films

Homework Statement Light of wavelength x, in air, is incident in air on a film of oil with index of refraction n_oil = 1.45. The film of oil has thickness L, and is spread on glass with an index of refraction n_glass = 1.50. The wavelength of the light in oil will be _____ than the wavelength...

Anybody?
7. ### Multiple FBD Dynamics Problem

Homework Statement The 4-kg uniform rod ABD is attached to the crank BC and is fitted with a small wheel that can roll without friction along a vertical slot. Knowing that at the instant shown crank BC rotates with an angular velocity of 6 rad/s clockwise and an angular acceleration of 15...
8. ### Linear and anular momentum of a hydrogen electron

Ok, I found the answer. Linear momentum 4.9821*10^-25 kg * m/s Angular momentum is 4.2182*10^-34 J*s There are also three other parts to the question: Find its kinetic energy, potential energy and total energy. (Use eV) I found its kinetic energy (.850625eV), but I can't find its potential...
9. ### Linear and anular momentum of a hydrogen electron

Homework Statement A hydrogen is in the excited state of n=4. Using the Bohr theory of the atom, find the radius of the orbit. Find the linear momentum of the electron. (kg*m/s) Find the angular momentum of the electron. (J*s) Homework Equations r = a*n^2 ??? maybe L =...
10. ### Finding the distance an object will travel

It's not really a problem, I'm doing an experiment where I hit an object with a hammer to see how far it travels. I have to determine whether the mass of the object affects how far it travels. Clearly it does, but I need some kind of relationship to prove it.
11. ### Finding the distance an object will travel

Ok, the force acted on the body for an instant; it struck the object, and the object started moving. It was similar to a hockey stick hitting a puck.
12. ### Finding the distance an object will travel

what is "e" in the equation a = -ve? Oh, also, I only know the force striking the object, I don't know the initial velocity.
13. ### Finding the distance an object will travel

Shooting star, if I use the formula for constant acceleration, then I will end up with this: (V^2-V_0^2)/(2*a) = \Delta x If I use this equation with no acceleration, then I won't be able to get a distance because you can't divide by zero. Or, is the acceleration not zero?
14. ### Finding the distance an object will travel

Hi. I have a question about finding the distance an object will travel along a horizontal surface. If I have a force striking an object directly in the horizontal direction, how would I go about finding how far it will travel? I already have found the frictional force acting on the object...
15. ### Coefficient of Friction?

well, i don't want to round yet because i need that to do calculations. jeez