Just after an alpha particle leaves the nucleus, would you expect it to speed up? Why?
A) No. Once the alpha particle leaves the nucleus it is slowed by the repulsion of the next closest atom's nucleus.
B) No. As the alpha particle leaves the nucleus it is slowed by the constant attraction of the electrons surrounding the nucleus.
C) Yes. Once the alpha particle leaves the nucleus there are no more forces acting on it and it therefore accelerates.
D) Yes. Once the alpha particle leaves the nucleus it accelerates because of mutual electric repulsion with the nucleus from which it escaped.
D
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Which of the following will happen to the relative humidity as the air temperature increases, and with no addition of water vapour to the air?
A. It will increase. B. It will decrease. C. It will remain the same. D. It will increase until it equals the dew point temperature.
The substance found in coal that contributes to acid rainfall is
A. nitrogen. B. chlorine. C. carbon. D. sulfur.
Which of the following is the starting material derived from natural gas that is used for the production of ethylene?
A) acetylene B) benzene C) ethane D) methane
Which of the following statements regarding streams and groundwater is NOT true?
A. groundwater baseflow is what allows streams to keep flowing during dry periods. B. infiltrating water contributes to the supply of groundwater. C. when the water table is higher than a stream channel, groundwater flows into the stream. D. when a stream goes dry it means the adjoining aquifer will also go dry. E. when the water table becomes lower than a stream channel, the stream can run dry.