Are the ring particles of Uranus primordial? Why or why not?
What will be an ideal response?
The ring particles of Uranus do not last forever as they collide with each other and are exposed to radiation. The rings may be resupplied with fresh particles occasionally as impacts on icy moons scatter icy debris.
Collisions among the large particles in the ring produce small dust grains. Friction with
Uranus's tenuous upper atmosphere plus sunlight pressure act to slow the dust grains
and make them fall into the planet. The Uranian rings actually contain very little dust.
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Air at 40ºC passes through an 80 cm by 60 cm rectangular duct 80 m long at 1 m/s. Estimate (a) the outlet temperature of the air if the duct wall temperature is 15ºC and (b) the hydraulic and thermal entrance lengths.
What will be an ideal response?
Intensity of Sound: The intensity level is 65 dB at a distance 5.00 m from a barking dog. What would be a reasonable estimate for the intensity level if two identical dogs very close to each other were barking? You can ignore any interference effects.
A. 65 dB B. 68 dB C. 130 dB D. 136 dB
Most of the larger moons of gas giants were formed at the same time as the gas giants, but somewhere else in the Solar System, and captured by the gas giants later.
Answer the following statement true (T) or false (F)
__________ are emitted when high speed electrons decelerate as they are smashed into a metal target
Fill in the blank(s) with correct word