Clusters appear to have ________ dark matter than their individual galaxies
Fill in the blank(s) with correct word
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A deuteron has the same charge as an electron but approximately twice a proton's mass. Suppose deuterons are accelerated in a cyclotron in an orbit of 750. mm at a frequency of 8.00 MHz. What magnetic field is needed?
What will be an ideal response?
The coefficient of friction between a block and the plane is 0.25 (see figure). The minimum horizontal force F (in newtons) required to cause the block to slide up the plane is:
(A) 827
(B) 714
(C) 609
(D) 522
A thin cylindrical shell is released from rest and rolls without slipping down an inclined ramp that makes an angle of 30° with the horizontal. How long does it take it to travel the first 3.1 m?
A) 1.4 s B) 1.1 s C) 2.1 s D) 1.6 s E) 1.8 s
The uppermost layer of Earth's structure is called the ________.
A. surface B. silicate C. mantle D. core E. crust