If the absolute value of the magnification is smaller than one, then the image is
A)
larger than the object.
B)
the same size as the object.
C)
smaller than the object.
C
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One phenomenon that supports the wave theory of radiation is
A) the transference of energy by a light beam. B) the tiny flashes when a light beam strikes a screen. C) the tiny flashes when an electron beam strikes a screen. D) interference effects with light. E) None of the above.
The figure shows a ‘snapshot’ of four different waves in identical ropes stretched with the same force
The wave with the largest frequency is
a.
I.
b.
II.
c.
III.
d.
IV.
e.
all of the above.
Viscosity: Motor oil, with a viscosity of 0.25 N ? s/m2, is flowing through a tube that has a radius of 3.0 mm and is 1.0 m long. The drop in pressure over the length of the tube is 200 kPa. What is the average speed of the oil?
A. 0.80 m/s B. 0.90 m/s C. 1.0 m/s D. 1.1 m/s E. 1.2 m/s
A home fireplace loses most of its heat by
a. radiation into the room. b. convection up the chimney. c. radiation up the chimney. d. conduction to the sides of the fireplace.