Energy in Nuclear Reactions: An excited U* nucleus undergoes fission into two fragments as follows:U*? Ba + KrThe following atomic masses are known:Kr: 91.926270 u

src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f440g1q10g6.jpg" style="vertical-align: -21.0px;" />Ba: 143.922845 uU*: 236.045563 uWhat is the reaction energy released during this fission reaction? (1 u = 931.5 MeV/c2)



A. 150 MeV

B. 160 MeV

C. 170 MeV

D. 180 MeV

E. 190 MeV

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Answer: D

Physics & Space Science

From the observation that the same side of the Moon always faces Earth, one can conclude that

A. the Moon completes two rotations each time it completes an orbit around Earth. B. the Moon does not rotate. C. the Moon completes one rotation each time Earth rotates. D. the Moon completes one rotation each time it completes an orbit around Earth.

Fissioning carbon would occur with

A) absorption of energy. B) release of energy. C) neither of these

The transition from single to multicellular life took over two billion years

Indicate whether the statement is true or false

A person's eye lens is 2.8 cm from the retina, and his near point is at 25 cm. What must be the focal length of his eye lens so that an object at the far point of the eye will focus on the retina?

A) -2.8 cm B) 2.8 cm C) -2.4 cm D) 2.4 cm E) 2.2 cm