Object 1 has more kinetic energy than Object 2. How do the magnitudes of their momenta compare?
1. p1 = p2
2. p1 > p2
3. p1 ? p2
4. not enough information given to tell
4
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In the context of the Sun, which of the following statements is true of electromagnetic radiation?
A) Protons cannot make electromagnetic radiation. B) Electromagnetic radiation is usually made by electrons. C) Electromagnetic radiation is made when most of the electrons in the Sun are static. D) The presence of isotopes in the Sun causes the emission of electromagnetic radiation.
What was Neptune's Great Dark Spot?
What will be an ideal response?
Energy flows by radiation or convection inside stars but almost never by conduction
a. True b. False Indicate whether the statement is true or false
Why does the abundance of iridium suggest that the iridium came from an impact?
A. Iridium is rare on Earth's surface but common in meteorites that have impacted the Earth. B. Iridium forms in forest fires, which were presumably ignited by the impact. C. Iridium can only be made under the high-pressure conditions of an impact. D. Iridium does not exist on Earth, so it must have come from space.