# Search results

1. ### Fit P(w) to determine Q,w, and R (Series RLC AC circuit)

Homework Statement Fit P(w) to determine Q, and w_0, and R. You should put in Vrms as a known constant. Homework Equations P(\omega)={\frac{V_{rms}^{2}}{R(1+Q^2(\frac{\omega}{\omega_0}-\frac{\omega_0}{\omega})^2)} Q=\frac{\omega_0}{\Delta\omega} R=R_load+r The Attempt at a...
2. ### Conceptual circuit question

Thank you for the reply. Does that mean that electrons will continuously accumulate in the broken branch and then scatter?
3. ### Conceptual circuit question

Hi. I'm not sure if this is the right place to pose this question as it is not homework question. I'm studying RC circuits in second semester physics and I have a question about the electrons traveling through a circuit. Is it true that electrons won't travel down a branch of a circuit in...
4. ### Can anyone help a gal?

Hi. I would think of the components of the tensions in each string that are opposing the force of gravity....(100N*sin(37) is one of them)
5. ### Series vs. parallel capacitors

Homework Statement I have some results of my lab here and I just want to check to make sure they make sense. The lab write-up refers to this part of the experiment as "capacitors in parallel" but I think they are actually in series (either that or we connected them incorrectly). Here is...
6. ### Speed of a Rocket far from Earth

Conservation of energy was my second attempt. I set it up as this: P.E. + K.E. = K.E. + P.E. OH!!!!!!!!!!!! I see. Dang, for some odd reason the first time I tried this approach I used 9.8 as the value for P.E. ...how foolish. I see now. Thank you so much. Man, I cannot afford to...
7. ### Speed of a Rocket far from Earth

Homework Statement A rocket is launched straight up from the earth's surface at a speed of 1.60×10^4 m/s. What is its speed when it is very far away from the earth? Homework Equations F= (GMm)/r^2 G= 6.67 X 10^-11 M= 5.98 X 10^24 Potential Energy = (Gm1m2)/r Kinetic Energy =...

North?
9. ### Is this problem missing info?

Homework Statement A sailboat is heading due east at 8 mph. The wind appears to blow from the south west (toward the north east – that is 45 degrees north of east) as observed from the sailboat. What is the speed and direction of the wind as observed from the ground? Homework Equations...
10. ### Rain drops relative velocity

Ahh, I see now. Thank you once again for your help. That clears things up for me.
11. ### Rain drops relative velocity

I am still not understanding this. I have some experience with vector arithmetic. I believe that I understand the concept. Most importantly I understand: "The velocity of the rain relative to the car is the difference between the velocity of the rain relative to the ground and the velocity...
12. ### Rain drops relative velocity

Thank you for your response. Everything you have said makes sense to me except for one part. I drew the first vector (the velocity of the rain drop relative to the ground) from the origin towards the positive x-axis with an angle of 0 going counterclockwise from the origin. Is this right...
13. ### Simple Angle Problem

I believe the angle is 116.35. Draw and solve the right triangle using your coordinates. Then, you can use the other trig functions to get the correct angle. I am sure there is a more sensible approach to my solution, but this was the first that came to my mind.
14. ### Simple Angle Problem

What are the y and x component values?
15. ### Rain drops relative velocity

Homework Statement While driving north at 25 m/s during a rainstorm you notice that the rain makes an angle of 38 degrees with the vertical. While driving back home moments later at the same speed but in the opposite direction, you see that the rain is falling straight down. From these...
16. ### Sliding down a hill with friction

That helped a lot. Thank you very much. I see now that my post was extremely confusing. I'm sorry about that. I reviewed my FBD drawing skills and I understand exactly where I went wrong. I really appreciate your time. Does anyone know how to mark this as solved? I looked under thread...
17. ### Sliding down a hill with friction

Homework Statement Johnny jumps off a swing, lands sitting down on a grassy 20 degree slope, and slides 3.5m down the slope before stopping. The coefficient of kinetic friction between grass and the seat of Johnny's pants is 0.5 Homework Equations F=ma Frictional force = \muN...
18. ### Conceptual Friction problem

Thanks for the reply, F is pushing right and upwards. Sorry about that. The drawing is an angle of approximately 30 degrees but it is not labeled.
19. ### Conceptual Friction problem

Homework Statement There is a box drawn on a horizontal surace. A force is being applied at an unkown angle in the positive x direction to the box. The angle is greater than 0 and less than 90. I'm assuming a standard coordinate system. "In the diagram above the box is stationary as the...
20. ### Phy121 are these answers correct?

If no one has time for the entire practice exam, maybe someone could check the first 8 multiple choice conceptual questions? That would help a lot.
21. ### Phy121 are these answers correct?

Homework Statement I have a test in the morning. Here is a link to the website where a practice test is located. http://www.mc.maricopa.edu/~vantassell/PHY121/phy121.html [Broken]. It is on the left under sample test 1. Homework Equations The relevant equations are at the bottom of the...
22. ### Constant acceleration from X vs. T on logger pro

Yes it would. I realized that I made that error after I left the computer. So, I'm guessing you could calculate the change of the slope of the tangent line.
23. ### Constant acceleration from X vs. T on logger pro

Homework Statement I have a conceptual problem that involves logger pro. Unfortunately, I do not have access to logger pro. Here it is: Suppose you have used a motion detector to collect data for an object that is moving with constant acceleration. Describe how to use LoggerPro to...