The decay: n ? p + e- + ve does not occur as it would violate conservation of
A)
baryon number.
B)
mass.
C)
charge.
D)
lepton number.
E)
angular momentum.
D
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To which of these phenomena are X-ray busters most similar?
A) novae B) planetary nebulae C) type I supernovae D) type II supernovae E) hypernovae
If a heat engine has an efficiency of 28.0% and its power output is 540 W, what is the rate of heat input from the combustion phase?
a. 151 W b. 2 030 W c. 1 930 W d. 1 830 W e. 1 730 W
A horizontal 2.00-m long, 5.00-kg uniform beam that lies along the east-west direction is acted on by two forces. At the east end of the beam, a 200-N forces pushes downward. At the west end of the beam, a 200-N force pushed upward
What is the angular acceleration of the beam? A) 240 rad/s2 north B) 1.33 × 102 rad/s2 north C) zero D) 240 rad/s2 south E) 1.33 × 102 rad/s2 south
Bright and dark fringes are seen on a screen when light from a single source reaches two narrow slits a short distance apart. The number of fringes per unit length on the screen can be doubled
A.
B.
.C.
.D.
E.
.