On a cosmic calendar, in which the history of the universe is compressed into 1 year, when did Kepler and Galileo first discover that we live on a planet in solar system
a) December 17
b)September 3
c) 1 second ago
c) 1 second ago
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Power: How much energy does a 100-W light bulb use in 8.0 hours?
A. 0.0080 kWh B. 0.80 kWh C. 13 kWh D. 800 kWh
The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glass rod of equal lengths at room temperature are dropped into boiling water. The change in length of the ordinary glass rod will be 3 times the change in length of the Pyrex glass rod
a. True b. False Indicate whether the statement is true or false
When electrons fill a subshell in which the orbitals have equal energy, the order in which the orbitals are filled is such that
a. a minimum number of electrons has unpaired spins. b. a minimum number of electrons has intrinsic angular momentum. c. a maximum number of electrons has unpaired spins. d. a maximum number of electrons first fills the next energy level. e. the maximum number of electrons has the same set of quantum numbers.
Your temperature is 98.6°F. Assuming your skin is a perfect radiator (? = 1), determine the wavelength corresponding to the largest intensity (in ?m)
a. 8.0 b. 9.3 c. 3.0 d. 5.7 e. 29.4