A three-dimensional image made using a laser is a(n)
a. emission spectrum.
b. absorption spectrum.
c. wave function.
d. hologram.
e. photoelectric effect.
d
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Derive an equation in the form ch = f(T, D, U?) for flow of air over a long horizontal cylinder for the temperature range 0°C to 100°C, using as a basis.
GIVEN
• Flow over a long horizontal cylinder
• Air temperature range is 0°C < T < 100°C
FIND
• An equation in the form ch = f(T, D, U?) based on Equation (6.3)
ASSUMPTIONS
• Steady state
• Prandtl number variation is negligible
SKETCH
What energy must be added or given off in a reaction where a helium atom is separated into two hydrogen atoms and two neutrons? (Atomic masses for each: hydrogen, 1.007825 u; neutron, 1.008665 u; helium, 4.002602 u; also, 1 u = 931.5 MeV/c2.)
a. 28.3 MeV given off c. 20.7 MeV given off b. 20.7 MeV added d. 28.3 MeV added
If the plane of the Earth's equator were not tilted with respect to the ecliptic plane
a. the daylight period of Earth would be the same year-round. b. there would be no seasonal changes. c. Earth's poles would not experience six month long nights. d. All of the above
Briefly state the uncertainty principle
What will be an ideal response?