When the reflection of an object is seen in a plane mirror, the distance from the mirror to the image depends on:
a. the distance from the object to the mirror.
b. the size of the object.
c. the distance of both the observer and the object to the mirror.
d. the wavelength of light used for viewing.
A
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As a copper wire is heated, its length increases by 0.200%. What is the change of the temperature of the wire? (aCu = 16.6 × 10^-6/C°)
a. 120°C c. 30.1°C b. 60.2°C d. 6.0°C
In organic molecules, a chlorine atom will normally form how many bonds?
a. 2 b. 3 c. 4 d. 1 e. 0
The star Algol is
a. an astrometric binary. b. a spectroscopic binary. c. a visual binary. d. an eclipsing binary. e. a spectroscopic binary and an eclipsing binary.
Work-Energy Theorem: How much work must be done by frictional forces in slowing a 1000-kg car from 26.1 m/s to rest?
A. 3.41 × 105 J B. 2.73 × 105 J C. 4.09 × 105 J D. 4.77 × 105 J