Models for combining the electromagnetic, weak and strong nuclear interactions into a single basic force are __________
Fill in the blank(s) with correct word
GUTs
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Atomic Nucleus: All nuclei of a given element have the same number of
A. neutrons. B. protons. C. nucleons. D. protons + neutrons.
You do 174 J of work while pulling your sister back on a swing, whose chain is 5.10 m long
You start with the swing hanging vertically and pull it until the chain makes an angle of 32.0° with the vertical with your sister is at rest. What is your sister's mass, assuming negligible friction? A) 22.9 kg B) 19.5 kg C) 26.3 kg D) 28.4 kg
Does Hubble's law work well for galaxies in the Local Group? Why or why not?
A) Yes, it works so well that we have never detected any measurable deviations from its predictions. B) No, because galaxies in the Local Group are gravitationally bound together. C) No, because we do not know the precise value of Hubble's constant. D) No, because Hubble did not know the Local Group existed when he discovered his law.
The region of the electromagnetic spectrum with wavelengths just less than those in the ultraviolet region is the ______________ region
a. x-rays b. radio waves c. microwaves d. infrared e. gamma rays