A person having a near point of 25 cm uses a magnifying glass with a focal length of 10 cm. What is the angular magnification of the glass for that person when her eyes are focused at infinity?
A) 1.5
B) 2.5
C) 3.5
D) 4.5
B
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An object is moving in a circular path with an angular speed of 1.52 rad/s. How long does it take the object to complete one revolution?
A) 4.13 s B) 2.07 s C) 118 s D) 4.77 s E) 8.26 s
The resolution of a 10-meter telescope is about 0.01 arcsecond for visible light. Would you expect the angular resolution of a 10-meter radio telescope to be better than, equal to, or worse than 0.01 arcsecond? Explain
What will be an ideal response?
The scalar product is commutative
Indicate whether the statement is true or false
Energy in Nuclear Reactions: When a neutron collides with a uranium-235 nucleus it can induce a variety of fission reactions. One such reaction is src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f440g1q12g6.jpg" style="vertical-align: -21.0px;" />Xe: 139.921620 u
U + 
n ? 
Xe + 
Sr + 2 
nThe following mass values are known:
Sr: 93.915367 u
U: 235.043924 u
n: 1.008665 uWhat mass of uranium is needed to produce a 10-kiloton yield? (1 u = 931.5 MeV/c2 = 1.66054 × 10-27 kg, 1-kiloton yield = 5.0 × 1012 J)
A. 0.57 kg
B. 0.66 kg
C. 6.58 kg
D. 3.85 kg
E. 1.10 kg