What is the only element in your body that was formed during the Big Bang, and not in cores of stars? Explain how you know this
What will be an ideal response?
Hydrogen was formed during the Big Bang and not in stellar cores. In stellar cores, hydrogen is fused into heavier elements, so the hydrogen used is that which was formed in the Big Bang.
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Three point charges are positioned as follows: 
is at (0.00 m, 0.00 m), 
is at (1.20 m, 0.00 m), and 
is at (1.20 m, 1.60 m). If all three charges are negative, into which quadrant is the force on 
pointing?
A. 1st B. 2nd C. 3rd D. 4th E. there isn't enough information in the problem to solve this
An observer at Earth's geographic north pole would find _______
a. the celestial equator passing at 45 degrees above the northern horizon. b. the celestial equator passing at 45 degrees above the southern horizon. c. that the celestial equator coincides with the horizon. d. the celestial equator passing directly overhead. e. None of the other choices are true.
A feature of the quantum model of the atom that is not a feature of the Greek or planetary models is that
A) the quantum model is only a theory, whereas the other two models are supported by factual evidence. B) the quantum model of the atom cannot be visualized. C) Both of the above. D) the quantum model can explain electrical effects. E) All of the above.
Forbidden transitions and selection rules suggest that
a. a photon has linear momentum. b. a photon has energy. c. a photon has angular momentum. d. a photon has parity. e. a photon has mass.