The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The velocity acquired after starting from rest is __________
Fill in the blank(s) with correct word
8 m/s
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The Large and Small Magellanic clouds are satellites galaxies of the Milky Way
Indicate whether the statement is true or false
How do astronomers calculate a telescope's light collecting area (A)? (where r = radius of the telescope's mirror or lens)
A. A = ?r2 B. A = 2?r C. A = 4/3 ?r3 D. A = 4?r2
For a body emitting blackbody radiation, the total power emitted is proportional to the 4th power of the body's absolute temperature: (T in kelvins) and the wavelength of the emitted EM radiation that has the highest intensity is inversely proportional to the body's absolute temperature according to: ( in meters, T in kelvins) Assume an object is emitting blackbody radiation. As the temperature
of a body increases, a. the body gets brighter. b. the color of the body shifts from red to white. c. the wavelength of the most intense light decreases. d. the frequency of the most intense light increases. e. all the above.
A contact lens is made of plastic with an index of refraction of 1.50 . The lens has an outer radius of curvature of +2.0 cm and an inner radius of curvature of +2.5 cm. What are the focal length and the power of the lens?