Homework Help for Physics (page 3156)

96,369 Results
Ask your question
Ask your question
(True/False)
1. A long straight wire parallel to the y axis carriesacurrent of 6.3 A in the positive y direction. There is auniformmagnetic field of 1.5 T in the positive x direction. Theforce perunit length on the wire is approximately 9.5 N/m and is inthepositive z direction.
2. A long wire carries a current toward the north in amagneticfield that is directed vertically downward. The directionof themagnetic force on the wire is toward the west.
3. A long straight wire parallel to the y axis carriesacurrent of 6.3 A in the positive y direction. There is auniformmagnetic field of 1.5 T in the positive x direction. Theforce perunit length on the wire is approximately 9.5 N/m and is inthenegative z direction
4. The figure shows the motion of electrons in a wirewhich isnear the North pole of a magnet. The wire will be pushedaway fromthe magnet.
5. A long wire carries a current toward the east in amagneticfield that is directed due south. The direction of themagneticforce on the wire is vertically downward.

Hi, I need help with the following question. Could you pleaseshowyour work so that I may better understand how the solutionwasachieved? Thanks!

Upper plane d Lower planeUsethe figure as a reference for problems (1) and(2)

(1)Potassium iodide has a crystalline structure with atomicplanesseparated by 0.353 nm. A monochromatic x-ray shows afirst-orderdiffraction maximum when the grazing angle is7.60°.
a) Calculate the x-ray wavelength
b) Assume now that the x-ray is observed at an incident angleof31.9°. Will constructive interference occur? (Defend yourargumentcalculatively)

(2) Assume 0.140 nm x-rays are diffracted on aninterplanarspacing of NaCl, which is 0.281 nm.

a) What is the predicted angle in the first-order?

b) What is the predicted angle in the second-order?

c) What is the maximum order for reflection? Why?



Homework Help 30,000,000
Physics 960,000