A crystal diffracts a beam of electrons, like a diffraction grating, as they hit it perpendicular to its surface
The crystal spacing is 0.18 nm, and the first maximum scattering occurs at 80° relative to the normal to the surface. (e = 1.60 × 10-19 C, melectron = 9.11 × 10-13 kg, h = 6.626 × 10-34 J ? s)
(a) What is the wavelength of the electrons?
(b) What potential difference accelerated the electrons if they started from rest?
(a) 0.18 nm
(b) 48 V
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A) two pieces of continental crust separating B) two pieces of oceanic crust colliding C) two pieces of continental crust colliding D) pieces of oceanic and continental crust colliding
Three resistors of 12, 12, and 6.0 ? are connected in parallel. A 12-V battery is connected to the combination. What is the current through the 6.0-? resistor?
A) 1.0 A B) 2.0 A C) 3.0 A D) 4.0 A E) 5.0 A
We have observed a comet strike Jupiter
Indicate whether the statement is true or false
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a. 8% b. 18% c. 2% d. 15%