The dusty ring around Jupiter was discovered in 1979 by ________
Fill in the blank(s) with correct word
Voyager 1
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Inside a freely-falling elevator your
A) acceleration is zero. B) weight is zero. C) gravitational interaction with Earth is zero. D) all the above E) none of the above
Bob is in a spaceship going by you at 90% of the speed of light, but in an upright standing position. Bob measures his mass to be 50 kg, his height to be 2.0 meters, and his waist size to be 80 cm. What would you say about his measurements?
A) His mass is more than 50 kg, his height is still 2.0 meters, and his waist size is less than 80 cm. B) His mass is more than 50 kg, his height is less than 2.0 meters, and his waist size is less than 80 cm. C) His mass is less than 50 kg, his height is more 2.0 meters, and his waist size is less than 80 cm. D) You would measure the same mass and size as he does.
Which statement gives the relationship between the waves in the electric and magnetic fields in an electromagnetic wave?
A) They are in phase and parallel with each other in space. B) They are 90 degrees out of phase but parallel in space. C) They are in phase but perpendicular to each other in space. D) They are 180 degrees out of phase and random in their inclinations to each other. E) They are in phase but opposite in direction of motion.
When work is done on a system while additional heat is subtracted, the temperature of the system
A) increases. B) decreases. C) remains unchanged. D) need more information