A camera has a converging lens with a focal length of 56 mm. If the f-number is 2.8, what is the diameter of the lens (in mm)?
a. 10
b. 31
c. 0.50
d. 20
e. 50
D
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A car uses gasoline to convert
A) potential energy into radiative energy B) kinetic energy into potential energy C) radiative energy into kinetic energy D) potential energy into kinetic energy
On a scale in which the distance from Earth to the Sun is about 15 meters, the distance from Earth to the Moon is ________
A) about 30 meters B) small enough to fit within your hand C) about 1 meter D) about 5 meters
Process of Science: Now that Pluto is no longer considered a planet, the number if planets in the Solar System has dropped from 9 to 8. Does this mean that the nebular theory of the Solar System was incorrect?
What will be an ideal response?
The quantity "pressure" expressed in terms of the fundamental quantities (mass, length, time) is equivalent to
a. MLT?1. b. ML?1T?2. c. M2L?1T?3. d. a dimensionless quantity.