A lens of focal length 90 mm is used as a magnifier by a person with a near point of 25 cm. The object being viewed is 9.9 mm long, and is positioned at the focal point of the lens
What is the angle subtended by the image at infinity, in milliradians? A) 110 mrad
B) 73 mrad
C) 37 mrad
D) 147 mrad
E) 183 mrad
A
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In a circuit made up of inductor, resistance, ammeter, battery and switch in series, at which of the following times after the switch is closed is the rate of current increase greatest?
a. zero b. one time constant c. reciprocal of one time constant d. ten time constants
How is distance determined to the nearest stars? How far out can this technique be applied? How many stars can be measured in this way?
What will be an ideal response?
A 2.0-kg object is moving without friction along the x-axis. The potential energy curve as a function of position is shown in the figure, and the system is conservative
If the speed of the object at the origin is 4.0 m/s, what will be its speed at 7.0 m along the +x-axis? A) 4.0 m/s B) 4.2 m/s C) 4.4 m/s D) 4.6 m/s E) 9.8 m/s
Describe one major accomplishment for each of the following people: Copernicus, Tycho Brahe, Kepler, and Galileo
What will be an ideal response?