In 1994, fragments of Comet P/Shoemaker-Levy 9 collided with Jupiter. Assume that these fragments came from very very far away with no initial speed, and neglect the effect of the sun
What was their speed when they neared Jupiter's surface at a distance of 71.4 × 106 m from its center? Jupiter has a mass of 1.90 × 1027 kg, and G = 6.67 × 10-11 N ? m2/kg2. A) 10,400 m/s
B) 11,200 m/s
C) 35,500 m/s
D) 42,100 m/s
E) 59,600 m/s
E
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Answer the following statement true (T) or false (F)
The belts and zones of Jupiter are
A) alternating bands of rising and falling air at different latitudes. B) cyclonic and anticyclonic storms. C) names for different cloud layers on Jupiter. D) alternating regions of charged particles in Jupiter's magnetic field. E) the thermosphere and stratosphere respectively.
A circular loop of wire of radius 10 cm carries a current of 6.0 A. What is the magnitude of the magnetic field at the center of the loop? (?0 = 4? × 10-7 T ? m/
A) A) 3.8 × 10-5 T B) 3.8 × 10-7 T C) 1.2 × 10-5 T D) 1.2 × 10-7 T E) 3.8 × 10-8 T
Camera Exposure: A lens of focal length 45 mm is mounted on a 35-mm camera. The lens aperture is set at f/2.0 and the shutter speed set at 1/2000 s. The photographer wants to keep the same exposure (amount of light), but wants to change the f-number to f/8.0 for greater depth of field. What should be the new shutter speed to maintain the same exposure?
A. 1/1000 s B. 1/500 s C. 1/4000 s D. 1/8000 s E. 1/125 s