The microwave emission detected by Arno Penzias and Robert Wilson fits a blackbody spectrum with a temperature of about ____
a. 0 K
b. 273 K
c. 27 K
d. 7.2 K
e. 2.7 K
e
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Ultraviolet light has wavelengths that are ________ visible wavelengths.
A. the same energy as B. slower than C. shorter than D. faster than E. longer than
A planet is discovered to orbit around a star in the galaxy Andromeda, with the same orbital diameter as the Earth around our sun
If that star has 4 times the mass of our sun, what will the period of revolution of that new planet be, compared to the Earth's orbital period? A) four times as much B) one-half as much C) one-fourth as much D) twice as much E) times as much
A light bulb operating at a dc voltage of 120 V has a power rating of 60 W. What is the current through this bulb?
A) 1.5 A B) 2.5 A C) 0.50 A D) 2.0 A E) 1.0 A
Which of the following statements is incorrect?
What will be an ideal response?