The hydrogen in the universe was formed by
a. the energy of the Big Bang c. radioactive decay of heavy elements
b. nuclear fusion reactions in stars d. none of the above
A
You might also like to view...
How many values of the magnetic quantum number, m?, correspond to a value of 4 for the orbital quantum number, ??
A) 3 B) 5 C) 8 D) 9 E) 7
You use a camera with a lens whose focal length is 50.00 mm, and are taking a picture of a 2.500 m tall statue that is located 7.200 m from the lens. If the image height on the film is 18.20 mm, what is the distance from the lens to the film?
A. 5.035 cm B. need more information C. 6.32 mm D. 5.242 cm
In the mid-19th century, what was the single largest cause of death?
What will be an ideal response?
A wire has a cross-sectional area of 0.10 mm2. If there are 4.0 × 1028 atoms per cubic meter in this wire, and if each atom contributes 2 free electrons, what is the drift velocity of the electrons when the current in the wire is 6.0 A?
(e = 1.60 × 10-19 C) A) 0.0047 m/s B) 0.0092 m/s C) 0.94 m/s D) 0.019 m/s