What is the magnification of a telescope and eyepiece if the telescope objective has a focal length of 200 cm and the eyepiece has a focal length of 2.0 cm
a. 400 times
b. 4000 times
c. 100 times
d. 1000 times
e. 40 times
C
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Electric potential decreases when moving farther from positive charges or nearer to negative charges
Indicate whether the statement is true or false
The shapes of planetary orbits are __________
Fill in the blank(s) with correct word
A uniform solid sphere rolls down an incline of height 3 m after starting from rest. In order to calculate its speed at the bottom of the incline, one needs to know:
a. the mass of the sphere. b. the radius of the sphere. c. the mass and the radius of the sphere. d. no more than is given in the problem.
An airplane overhead exceeds the sound barrier and produces a conical wave front. If the air through which the plane flew had been significantly warmer and the plane were traveling at the same speed, how would the angle of the conical wave front been different?
1.The angle would have been greater. 2.The angle would have been less. 3.The angle would have been the same. 4.The change in the angle cannot be determined from the information given.