X rays with a wavelength of 0.21 nm undergo first-order diffraction from a crystal at a 52∘ angle of incidence. At what angle does first-order diffraction occur for x rays with a wavelength of 0.14 nm? Express your answer in degrees.

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

What should the power status of a circuit be when measuring resistance with an ohmmeter?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2