An incandescent light (glowing tungsten filament) produces:
A) a continuous spectrum, with the peak giving the temperature of the filament.
B) an emission spectrum, with bright lines due to ionized tungsten.
C) an absorption spectrum, with dark lines due to the solid filament.
D) a continuum, with bright tungsten lines added.
E) a continuum, with dark lines of tungsten and argon as well.
A
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Two forces act on a 55-kg object. One force has magnitude 65 N directed 59° clockwise from the positive x-axis, and the other has a magnitude 35 N at 32° clockwise from the positive y-axis. What is the magnitude of this object's acceleration?
A) 1.1 m/s2 B) 1.3 m/s2 C) 1.5 m/s2 D) 1.7 m/s2
Someone on the near side of the Moon would observe Earth rise once every
a. 24 hours. b. 24 hours and 50 minutes. c. 29.5 Earth days. d. None of these, the observer would never see Earth rise or set.
The lunar tides on Earth are making the Moon recede from Earth
a. True b. False Indicate whether the statement is true or false
Conservation of Momentum: In a police ballistics test, 2.00-g bullet traveling at 700 m/s suddenly hits and becomes embedded in a stationary 5.00-kg wood block. What is the speed of the block immediately after the bullet has stopped moving relative to the block?
Fill in the blank(s) with the appropriate word(s).