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

Physics & Space Science

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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

Physics & Space Science

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?

Physics & Space Science

The scalar product is commutative

Indicate whether the statement is true or false

Physics & Space Science

Energy in Nuclear Reactions: When a neutron collides with a uranium-235 nucleus it can induce a variety of fission reactions. One such reaction isU + n ? Xe + Sr + 2 nThe following mass values are known:

src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f440g1q12g6.jpg" style="vertical-align: -21.0px;" />Xe: 139.921620 uSr: 93.915367 uU: 235.043924 un: 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

Physics & Space Science