# Search results

1. ### How to carry units in integration

Homework Statement I am trying to integrate from 0 to 10 ft -4x^2/2+4x. I am solving for deflection. The forces are in kips. Somehow the book ends up with k-ft^3. I don't understand how I would carry units in an integration. Any help please? Homework Equations The Attempt at a...

Thank You!
3. ### Engineering Need to interview a Civil Engineer

If you don't mind answering this question, would you say the salary is better as a construction manager or about the same? Can all Civil engineers work as a construction manager?
4. ### Engineering Need to interview a Civil Engineer

Thank you so much for responding. I erased question 10, but it was basically how many specializations are there is civil engineering. @bklynkenny you said you don't work as an engineer. Is that because you have an MBA now and work as a manager? I am really interested in management.
5. ### Engineering Need to interview a Civil Engineer

Is it hard to find a job now as a Civil Engineering graduate? I am in the US.
6. ### Engineering Need to interview a Civil Engineer

1. What made you choose this type of engineering? 2. What type of equipment do you work with on a day to day basis? 3. What is your educational back ground? 4. What is your favorite part of the job? 5. What is you least favorite part of the job? 6. Do you need a...

8. ### Dispersion by diffraction grating

That's the equation I'm used to. If we assume that the angle is small then sintheta=y/L dsintheta=m*wavelength d(y/L)=m*wavelength m*wavelength*L/(d)=y ? I don't know what's wrong with the equation. For the units I coverted everything to cm because 1/7300=d in cm.
9. ### Dispersion by diffraction grating

Homework Statement White light containing wavelengths from 396 nm to 756 nm falls on a grating with 7300 lines/cm. How wide is the first-order spectrum on a screen 2.15 m away? Homework Equations y=m*L*wavelenth/(d) The Attempt at a Solution using the equation I have found y1 to...
10. ### Induced emf at a specific time

Thank you very much I appreciate it.
11. ### Induced emf at a specific time

Could you please tell me where I'm wrong? I have a couple of hours left.
12. ### Induced emf at a specific time

I plugged in -36.12 but it's still wrong. Can we have a negative voltage?
13. ### Induced emf at a specific time

Homework Statement A circular coil with 35 turns of wire and a diameter of 19 cm is placed in a magnetic field given by B(t) = 6 t^2 + 6 t + 2 T where t is time in seconds. The field is perpendicular to the plane of the coil. What is the induced EMF at t = 5 s? Homework Equations...
14. ### Time required to charge a capacitor

Homework Statement A capacitor with a capacitance of C = 28.7 μF is slowly charged by a constant current of I = 63.2 nA. How long does it take to charge the capacitor to a voltage of V = 28.9 V? Homework Equations q=cvb(1-e^(-t/RC)) Vb=IR+QC The Attempt at a Solution I have tried...
15. ### Voltage experience by the bird

I thought that was the equation for voltage loss. Is it not?
16. ### Voltage experience by the bird

Ok so I got it by using voltage loss=amps*wire resitance/meter*distance Usually this equation is voltage loss=amps*wire resitance/meter*distance*2 wires Why was it not necessary to multiply the answer by 2 in this case?
17. ### Short circuit problem

R=sigma(x)/A, but area is not given either. I really don't understand.
18. ### Voltage experience by the bird

Homework Statement A bird stands on an electric transmission line carrying 2210 A, as seen in the figure below. The line has 3.32E-5 Ω resistance per meter and the bird's feet are 3.80 cm apart. What voltage does the bird feel? Homework Equations R=sigma(L)/A I=V/R The Attempt at a...
19. ### Short circuit problem

Homework Statement An underground telephone cable, consisting of a pair of wires, has suffered a short somewhere along its length (at point P in the Figure). The telephone cable is 4.00 km long, and in order to determine where the short is, a technician first measures the resistance between...
20. ### Electric field due to a finite line of charge

I get it. Thank you for your help.
21. ### Electric field due to a finite line of charge

I don't understand the difference between theta 1 and theta 2. Could you please explain to me on the graph?
22. ### Electric field due to a finite line of charge

Homework Statement A rod of length 25 cm has a uniform linear charge density of 7 μC/m. Determine the Electric Field at a point P located at a perpendicular distance 69 cm along a line of symmetry of the rod. Homework Equations E=k*charge density(integral(dx/(d^2+x^2)^3/2) The...
23. ### Four Charges

Homework Statement Four charges Aq,Bq,Cq, and Dq (q = 1.00 × 10-7C) sit in a plane at the corners of a square whose sides have length d = 85.0 cm, as shown in the diagram below. A charge, Eq, is placed at the origin at the center of the square. DATA: A = 6, B = 2, C = 3, D = 6, E = -1...
24. ### Question about coin toss

1. Homework Statement For this exercise, four coins are tossed 32 times and the number of heads are recorded for each toss. Each toss falls into one of the following macroscopic states; 0 heads, 1 heads, 2 heads, 3 heads and 4 heads. Suppose the 32 tosses result in the following outcome...
25. ### Time an object takes to oscillate

Homework Statement An object in SHM oscillates with a period of 5.73 s and an amplitude of 10.47 cm. How long does the object take to move from x=0 cm to x=5.78 cm? Homework Equations x=Acos(wt+ro) The Attempt at a Solution I solved for ro which was pi/2 when x=o and t=o. Then...
26. ### Time Constant problem

Homework Statement A spring with spring constant 18.39 N/m hangs from the ceiling. A 452 g ball is attached to the spring and allowed to come to rest. It is then pulled down 4.62 cm and released. What is the time constant if the ball’s amplitude has decreased to 2.85 cm after 32 oscillations...
27. ### Finding Phase Constant and air-track glider

Ok thank you very much for all your help. I greatly appreciate it.
28. ### Finding Phase Constant and air-track glider

The question has several parts and it's asking me for the phase at t=.5s. I used the same formula but it's wrong. Could you please let me know what's wrong? thank you.
29. ### Finding Phase Constant and air-track glider

I got the correct answer for the phase constant but I'm trying the phase for t=.5s. Sorry for the confusion.