What are fossil fuels?
A) any fuel that releases CO2 into the atmosphere upon burning
B) any fuel that is extracted from the interior of Earth
C) mineral-rich deposits from ancient seabeds
D) the carbon-rich remains of plants that died millions of years ago
E) carbonate-rich deposits from ancient seabeds
D
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The coefficients of friction for plastic on wood are ?s = 0.50 and ?k = 0.40. How much horizontal force would you need to apply to a 3.0-lb plastic calculator to start it moving from rest?
A) 1.2 N B) 2.7 N C) 6.7 N D) 0.15 N E) 0.50 N
If there had never been any galactic collisions, all galaxies today would probably be ________
Fill in the blank(s) with correct word
As a hot iron ring cools, the diameter of the hole
A) increases. B) decreases. C) remains the same.
In a Young's double slit experiment, if the separation between the two slits is 0.050 mm and the distance from the slits to a screen is 2.5 m,
find the spacing between the first-order and second-order bright fringes for light with wavelength of 600 nm. A) 1.5 cm B) 3.0 cm C) 4.5 cm D) 6.0 cm E) 9.0 cm