A neutrino is ______________
a. a photon of light b. a positively charged particle
c. a subatomic particle d. a negatively charged particle
c
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A 5.00-kg box slides 4.00 m across the floor before coming to rest. What is the coefficient of kinetic friction between the floor and the box if the box had an initial speed of 3.00 m/s?
A) 1.13 B) 0.587 C) 0.115 D) 0.229 E) 0.267
What travels up and down the Sun's magnetic loops extending from the surface?
A) helium atoms B) plasma C) hyrogen atoms D) a blend of helium and hydrogen atoms
A galaxy has a recession velocity of 10,000 km/sec. If the Hubble constant is 65 km/sec. per megaparsec, roughly how far away is the galaxy?
A. 25 megaparsecs B. 10 megaparsecs C. 130 megaparsecs D. 60 megaparsecs
You observe a star very similar to our own Sun in size and mass. This star moves very slightly back and forth in the sky once every 4 months, and you attribute this motion to the effect of an orbiting planet
What can you conclude about the orbiting planet? A) The planet must be closer to the star than Earth is to the Sun. B) The planet must be farther from the star than Neptune is from the Sun. C) The planet must have a mass about the same as the mass of Jupiter. D) You do not have enough information to say anything at all about the planet.