The axial tilts of Uranus and Neptune are the same
Answer the following statement(s) true (T) or false (F)
Ans: False
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When you look into a pool of water, the depth looks less than it actually is because of __________
Fill in the blank(s) with correct word
The method of spectroscopic parallax cannot be applied to stars beyond about 100 pc
Indicate whether the statement is true or false
Which of the following is not key evidence in support of the idea that all life today shares a common ancestor?
A) We have identified fossils of the first life forms that ever existed on Earth. B) All life uses DNA and the same genetic code. C) Mapping of gene sequences shows how life is all related. D) All life builds proteins from the same amino acids and uses ATP to store energy in cells.
The rotating systems shown in the figure differ only in that the two identical movable masses are positioned a distance r from the axis of rotation (left), or a distance r/2 from the axis of rotation (right)
You release the hanging blocks simultaneously from rest, and call tL the time taken by the block on the left and tR the time taken by the block on the right to reach the bottom, respectively. The bar, pulley, and rope have negligible mass, the rope does not slip, and there is no friction in the axle of the pulley. Under these conditions A) tL = tR. B) tL = tR. C) tL = tR. D) tL = 2tR. E) tl = 4tR.