Neutron stars radiate most of their energy in the ____ wavelength band(s)
a. radio and infrared
b. radio and X-ray
c. visible
d. visible and gamma-ray
e. X-ray and gamma-ray
e
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The sidereal day is determined by the Earth's rotation with respect to the stars
Indicate whether the statement is true or false
Of all elements, ________ has the most stable and tightly bound nucleus
Fill in the blank(s) with correct word
Explain why we have seasons and compare/contrast the cycle of seasons for both hemispheres
What will be an ideal response?
A spherical interplanetary probe with 30-cm diameter contains electronic equipment that dissipates 100 W. If the probe surface has emissivity of 0.8, what is its surface temperature in outer space? State your assumptions in calculation.
GIVEN Interplanetary probe with 30-cm diameter, radius(r) =0.15 m Dissipation qr=100 W and emissivity (?)=0.8 • FIND Surface temperature in outer space. ASSUMPTIONS • Steady state condition. • Heat transfer only by radiation. • Temperatue of outer space is considered 0 Kelvin. (T2)=0 K PROPERTIES AND CONSTANTS The Stefan-Boltzmann constant (?) = 5.67 × 10–8 W/(m2 K4)