What is the relationship between the image distance and the object distance for a plane (flat) mirror?
A. They are not related
B. The image distance is double the object distance
C. The image distance is half the object distance
D. They are the same.
Ans: D. They are the same.
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A small steel sphere falls with a terminal velocity in a viscous fluid of 2.00 cm/s. If the radius of the steel sphere is doubled, then what is the terminal velocity of the sphere?
A. 1.00 cm/s B. 2.00 cm/s C. 4.00 cm/s D. 6.0 cm/s E. 8.00 cm/s
The temperature of a sample of water increases from 20°C to 46.6°C as it absorbs 5650 calories of heat. What is the mass of the sample? (Specific heat of water is 1.0 cal/g °C)
B) 622 g
C) 212 g
D) 310 g
Impacts were extremely common in the young solar system but are less common today
Indicate whether the statement is true or false
A ray of light passes from vacuum into a different substance where the speed of light decreases by 20%. What is the index of refraction of the substance it is traveling in?
1.1.25 2.0.2 3.0.8 4.1.2