If there are 2.54 cm/in., how many inches are there per centimeter?
1/2.54 = 0.394
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The power rating of a 400-? resistor is 0.800 W
(a) What is the maximum safe voltage across this resistor? (b) What is the maximum current the resistor can safely draw?
During the volcanic eruption of Mt. Pelee in 1902, an incredibly hot "burning cloud" rolled down the mountain and incinerated the town of Saint-Pierre. From the damage done, the temperature in the cloud was estimated at 700°C. If the air temperature
was 20°C and a mole of air is 29 grams, estimate the molecular weight of the gas in the "burning cloud" that made it heavier than the surrounding air. (As a follow-on, estimate the most probable composition of the cloud. Some typical volcanic gases are H2S, SO2, H2SO4, CO2, NO.)
Compared with falling on a wooden floor, a wine glass may not break when it falls on a carpeted floor because of
A) lesser impulse in stopping. B) longer time to stop. C) both of these D) none of the above
Coronal holes are holes in the chromosphere to allow the solar wind to stream away from the Sun
a. True b. False Indicate whether the statement is true or false