A rectangular garden measures 15 m long and 13.70 m wide. What is the length of a diagonal from one corner of the garden to the other?
A) 18 m
B) 19 m
C) 20 m
D) 4.1 × 102 m
C
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If continuous spectrum light from a star passes through a cool, low-density gas on its way to your telescope and spectroscope, ____ spectrum on the continuous spectrum results
a. a dark (absorption) line b. a bright (emission) line c. continuous
Our galaxy is suspected to be surrounded by a galactic halo or corona because the disk of the galaxy
a. rotates faster than expected in its outer region. b. rotates more slowly than expected in its outer region. c. is only visible during a total eclipse of our sun d. is surrounded above, below and well beyond by the brightly glowing corona.
The isotope 64Zn has a nuclear radius of 4.8 ×10-15 m. Which of the following is the mass number of an isotope for which the nuclear radius is 6.8 ×10-15 m?
a. 182 c. 145 b. 125 d. 96
Red light of the visible light spectrum has longer wavelengths than blue
a. True b. False Indicate whether the statement is true or false