Hubble's law implies that, at some time in the past, all the matter in the universe was at one place
Indicate whether the statement is true or false
TRUE
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Loop B?
A. Clockwise. B. Counterclockwise. C. No current flows in this loop. D. One needs more information to answer.
There is a legend of a Dutch boy who bravely held back the Atlantic Ocean by plugging a leak near the top of a dike with his finger until help arrived. Which is the more likely scenario?
A) the huge size of the Atlantic Ocean makes this impossible B) although the force on his finger would have been huge, the pressure would have been small enough for this to occur C) the force on his finger would have been less than 1 N D) both force and pressure on his finger would have been great, but not too great for a public-spirited Dutch lad E) none of the above
If a jet plane were to double its MACH-speed, its half-angle will
A) decrease. B) increase. C) stay the same.
X-rays come from certain regions of the interstellar medium because gas molecules in those regions are at a very high density
a. True b. False Indicate whether the statement is true or false