In adding the numbers 420.77, 13.821, and 2317.8 (a) the result should be rounded to how many significant figures? (b) what is the sum?
What will be an ideal response?
(a) 5 sig-figs
(b) 2752.4
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What is the correct fraction of dust to gas in the interstellar medium?
a. 1/99 b. 10/90 c. 50/50 d. 90/10
In which system is heat usually transferred from the cooler part to the warmer part?
a. a stove as it heats up water b. a refrigerator that is running c. an electric fan that is running d. none of the above, because it is impossible to transfer heat in this manner
What time is it at point 1?
A) noon B) midnight C) 6 a.m. D) cannot be determined from the information in the figure
A charged particle is moving perpendicular to a uniform magnetic field, the radius of its motion given by r = mv/Bq. The speed of the particle is tripled. The particle’s time to complete one loop
1.is divided by three. 2.triples. 3.stays the same. 4.changes in ways which cannot be determined with the information given.