During a nuclear reaction, the particles involved lose 4.8 × 10-28 kg of mass. How many joules of energy are released by this reaction? (c = 3.00 × 108 m/s)
A) 1.4 × 10-19 J
B) 5.3 × 10-45 J
C) 2.1 × 10-40 J
D) 4.3 × 10-11 J
E) 1.6 × 10-36 J
D
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A diverging lens will be prescribed by the eye doctor to correct which of the following?
a. myopia b. presbyopia c. hyperopia d. astigmatism
Radiant energy reaching the Earth from the sun is not sufficient to keep the Earth's surface temperature comfortable for life. Of the following, the most likely source of the additional thermal energy is from
a. fusion of hydrogen nuclei in the Earth's core. b. fusion of high Z nuclei in the Earth's core. c. fission of radioactive nuclei inside the Earth. d. fission of radioactive nuclei in cosmic rays. e. deflection of radioactive nuclei in cosmic rays.
A cyclotron is designed with a magnet that produces 1.2 T. When refurbished, the magnet is replaced by one that produces 1.5 T. How does the kinetic energy developed by the protons change compared to the previous energy developed?
A) It increases by 25%. B) It decreases by 25%. C) It increases by 56%. D) It decreases by 56%. E) It does not change.
Which layer of the Sun do we normally see?
A) photosphere B) corona C) chromosphere D) convection zone E) radiation zone