Some narrow rings of Saturn are seen in space probe photos to be caused by
a. gravitational interactions between ring particles.
b. a spiral density wave which confines them.
c. the magnetic field which holds them in place.
d. small shepherd moons that orbit inside and outside the rings
D
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How many degrees as measured on the celestial sphere does the Moon cover as it moves during the course of one day?
5 degrees 36 degrees 13 degrees 25 degrees
A defining feature of "pseudoscience" is
A) it is wrong. B) it does not use proper scientific methodology. C) Both of the above. D) it is unusual, or odd. E) All of the above.
The number of cycles of a wave passing a point per unit time is the wave's __________
Fill in the blank(s) with correct word
In a chiller unit, ammonia is to be condensed at a saturation temperature of 50ºC by passing the ammonia vapor over vertical plates 100 cm high by 150 cm wide and at a surface temperature of 20ºC. Estimate the average convective heat transfer coefficient and the amount of ammonia condensing from one plate surface. Use a value of 1052.8 kJ/kg for hnfg for ammonia.
What will be an ideal response?