A concave mirror has a focal length F. An object that is placed in front of the mirror has an image that
A. can be upright or inverted.
B. is always upright.
C. is always inverted.
D. depends on the magnitude of F.
A. can be upright or inverted.
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H II Regions are also called emission nebulae
a. True b. False Indicate whether the statement is true or false
Dimensional Analysis: When subtracting several quantities
A. the quantities can have any combination of units. B. the quantities must all have exactly the same units. C. the quantities must all be dimensionless.
Consider a two-slit interference experiment like the one shown in figure Q3.7b. The distance between adjacent bright spots in the interference pattern on the screen (A) increases, (B) decreases, or (C) remains the same if, The width of the slits increases
A. increases B. decreases C. remains the same
I wish to use a positively charged rod to charge a ball by induction. Which statement is correct?
a. The ball is charged as the area of contact between the two increases. b. The ball must be a conductor. c. The ball must be an insulator that is connected temporarily to the ground. d. The charge on the ball will be positive.