Methane-rich atmospheric planets ______________ and ________________ probably formed closer to the Sun and migrated outward
a. Jupiter and Saturn b. Saturn and Uranus
c. Uranus and Neptune d. Jupiter and Neptune
c
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When performing arithmetical operations using significant figures, how many significant digits can there be in a final answer that is obtained by multiplying or dividing the original recorded data?
According to string theory, six space-time dimensions cannot be measured except as quantum numbers of internal particle properties because they are curled up in size of the order of
a. 10?35 m. b. 10?15 m. c. 10?10 m. d. 10?8 m. e. 10?3 m.
A 120-m long copper wire (resistivity 1.68 × 10-8 ? ? m) has resistance 6.0 ?. What is the diameter of the wire?
A) 0.0065 mm B) 0.065 mm C) 0.65 mm D) 0.65 cm E) 0.65 m
Show that the temperature distribution in a sphere of radius ro, made of a homogeneous material in which energy is released at a uniform rate per unit volume Gq, is
GIVEN
- A homogeneous sphere with energy generation
- Radius = ro
FIND
- Show that the temperature distribution is as shown above.
ASSUMPTIONS
- Steady state conditions persist
- The thermal conductivity of the sphere material is constant
- Conduction occurs in the radial direction only
SKETCH
