In the proton-proton chain

a. no neutrinos are produced.
b. energy is released because a helium nucleus has a greater mass than a hydrogen nucleus.
c. no photons are produced.
d. carbon serves as a catalyst for the nuclear reaction.
e. energy is produced in the form of gamma rays and the velocity of the created nuclei.


e

Physics & Space Science

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a. 75°C c. 91°C b. 82°C d. 99°C

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A(n) ____________________ is the largest known structure in the universe

Fill in the blank(s) with correct word

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A ly (light year) is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in a ly? (1 mi = 1609 m and 1 yr = 365.25 days)

A) 9.46 × 1012 mi B) 9.46 × 1015 mi C) 5.88 × 1012 mi D) 5.88 × 1015 mi E) 2.87 × 1013 mi

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The star Wolf 359 is 7.7 light years away. What is that distance in kilometers?

a. 7.7 x 10^8 km b. 14 x 10^13 km c. 0.78 x 10^8 km d. 7.28 x 10^13 km e. 7.28 x 10^12 km

Physics & Space Science