Jupiter is slowly shrinking through gravitational contraction today
Indicate whether the statement is true or false
TRUE
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Which, if any, is an elementary particle?
a. the proton b. the ?– particle c. the muon d. All three are not elementary particles.
The Oort cloud is filled with stony-iron meteorites
Indicate whether the statement is true or false
Consider the magnitude of the average speed, vavg, speed, mag, and the magnitude of the average velocity, vavg, velocity, mag, for the same trip. Which of the following is always true?
a. vavg, speed, mag = vavg, velocity, mag b. vavg, speed, mag ? vavg, velocity, mag c. vavg, speed, mag ? vavg, velocity, mag d. none of the above
How much money does it cost to leave on 10 60 watt lights for 15 hours, if the cost of electricity is 8 cents per kWh?
a. 15¢ b. 32¢ c. 72¢ d. 120¢ e. 480¢