Define Trojan asteroids
What will be an ideal response?
Asteroids found sharing the orbit of Jupiter but 60 degrees ahead of or behind it at the L4 or L5 Lagrange points.
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A particle with charge 2?C is placed at the origin. An identical particle, with the same charge, is placed 2 m from the origin on the x axis, and a third identical particle, with the same charge, is placed 2 m from the origin on the y axis. The magnitude of the force on the particle at the origin is:
A) 9.0 × 10-3 N B) 6.4 × 10-3 N C) 1.3 × 10-2 N D) 1.8 × 10-2 N E) 3.6 × 10-2 N
The sun has a radius of
km and a rotational period of 25.38 days. What is the difference is there in the peak of the observed spectrum between light received from the approaching side of the Sun and from the receding side of the sun? Observations from the middle of the sun place the spectral peak at 480 nm.
A. 13 nm B. 6.4 nm C. 1.6 nm D. 3.2 nm
In years of heavy snow pack in the mountains it is sometimes desirable to induce early melting of the snow, rather than wait until it all melts suddenly and causes floods
It has been suggested that a way to accomplish this might be to have planes fly over the snow fields and sprinkle them with black soot. What do you think of this idea? Would it work? A) Yes, it would probably work because the black surface would be a better absorber of sunlight than would the white snow. B) Yes, it would work because the soot would raise the melting point of the snow. C) Yes, it would work because the soot would decrease the specific heat capacity of the snow. D) No, it would not work because it is infrared radiation and not visible radiation which melts the snow. E) No, it would not work because sunlight has very little effect on how fast the snow melts.
A dart is loaded into a spring-loaded toy dart gun by pushing the spring in by a distance d. For the next loading, the spring is compressed a distance d/2. How much work is required to load the second dart compared to that required to load the first?
1.two times as much 2.the same 3.half as much 4.one-fourth as much