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 acceleration after starting from rest is 8 m/s2
Indicate whether the statement is true or false
F
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The necessary chemical elements of life should
A) only be found on the Earth and Mars B) be widespread in the solar system but not elsewhere in our Milky Way galaxy C) be widespread throughout the universe D) be widespread in our Milky Way galaxy but not in other galaxies
Within Earth's atmosphere, in which layer does convection occur?
A) the troposphere B) the stratosphere C) the mesosphere D) the ionosphere E) Convection occurs in all layers of Earth's atmosphere.
A 15-?F capacitor and a 30-?F capacitor are connected in series, and charged to a potential difference of 50 V. What is the resulting charge on the 30-?F capacitor?
a. 0.70 mC b. 0.80 mC c. 0.50 mC d. 0.60 mC e. 0.40 mC
On a floodplain, the sediment grains away from the main river channel are
A) coarse-grained sand and gravels. B) fine-grained silts and clays. C) well-sorted and well-rounded sand particles. D) all of these