In a mass spectrometer, an ion will have a smaller radius for its circular path if
a. its speed is greater.
b. its mass is greater.
c. its charge is greater.
d. the magnetic field is weaker.
c
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A barge is 15.0 m wide and 75.0 m long and has vertical sides. The bottom of the hull is 1.20 m below the water surface. What is the weight of the barge and its cargo, if it is floating in fresh water of density 1000 kg/m3?
A) 22.6 MN B) 13.2 MN C) 1.35 MN D) 1.13 MN E) 11.3 MN
The energy radiated by a star, such as the sun, results chiefly from
A) beta decay. B) alpha decay. C) fission reactions. D) fusion reactions. E) radioactivity.
The oxygen in Earth's atmosphere
a. was manufactured inside stars. b. was added to the atmosphere by plant life. c. has grown more abundant since the origin of Earth. d. all of these e. none of these
The diagram below shows three approximate locations of the sun along the western horizon. Which number indicates the location of the sun at sunset on December 21st for an observer at latitude 48° N?
a. 1
b. 2
c. 3
d.The sun will set in the east.
e.The sun will not set on December 21st at this latitude.