Homework Help for Physics (page 3156)
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Consider the arrangement of ideal massless cables and a 450cmlong10kg
horizontal iron bar which are used to hang a bucket of waterfromtwo walls. What is the
tension in all the cables if 50kg of water is placed in thebucket?What is the vertical
force that each of the walls exerts on the iron rod? (EDIT:Addeddiagram below)
You can view the other times on Problem 5.7 onthislink:
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 is7.60Â°.
a) Calculate the x-ray wavelength
b) Assume now that the x-ray is observed at an incident angleof31.9Â°. 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?
I know that v=Awsin(wt) ...but I don't really know where to gofromthere...help!!
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