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
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A(n) ____________________ is the largest known structure in the universe
Fill in the blank(s) with correct word
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
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
At high noon, the Sun delivers 900 W to each square meter of a blacktop road. What is the equilibrium temperature of the asphalt, assuming its emissivity e = 1? (s = 5.67 × 10^-8 W/m2×K4)
a. 75°C c. 91°C b. 82°C d. 99°C