A(n) ____________________ periodically emits large amounts of X-ray radiation as material accretes around a neutron star or black hole
Fill in the blank(s) with correct word
X-ray burster
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Since there are no folded mountain chains on the Moon, what does this imply about the Moon's geology? a. Plate tectonics does not exist on the moon
b. The geological history is extremely short. c. Mountains were worn down by erosion. d. Mountains were destroyed during the heavy bombardment. e. Mountains were destroyed during the heavy bombardment.
Atmospheric molecules do not fly off into outer space due to
A) their chaotic speeds. B) their relatively low densities. C) Earth gravitation. D) cohesive forces.
What are the first three harmonics of a string of linear mass density 2.00 g/m and length 0.600 m when it is subjected to tension of 50.0 N?
What will be an ideal response?
A turbine blade 6.3-cm-long, with cross-sectional area A = 4.6 x 10–4 m2 and perimeter P = 0.12 m, is made of stainless steel (k = 18 W/(m K). The temperature of the root, Ts, is 482°C. The blade is exposed to a hot gas at 871°C, and the heat transfer coefficient h? is 454 W/(m2 K). Determine the temperature of the blade tip and the rate of heat flow at the root of the blade. Assume that the tip is insulated.
GIVEN
FIND
ASSUMPTIONS
Steady state conditions prevail
The thermal conductivity is uniform
The tip is insulated
The cross-section of the blade is uniform
One dimensional conduction
SKETCH
