What does it mean for an atom to be ionized?
a. An atom is only considered ionized if it has *fewer* bounded electrons than protons, causing it to have a net positive charge.
b. An atom is only considered ionized if it has *more* bounded electrons than protons, causing it to have a net negative charge.
c. An atom is only considered ionized if it has more or fewer bounded electrons than protons, causing it to have a non-zero charge.
d. An atom is only considered ionized if it has the same number of bounded electrons and protons, causing it to have a neutral, or net zero charge.
Answer: c. An atom is only considered ionized if it has more or fewer bounded electrons than protons, causing it to have a non-zero charge.
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An unconformity is
A) a scientific debate between Earth scientists. B) when younger igneous plutonic rocks are above older sediments. C) a continuous sequence of sedimentary layers. D) a gap in an otherwise continuous time-sequence of rock layers.
Compact fluorescent bulbs typically last 10 years while incandescent bulbs last about 1 year
For a given amount of light, a tungsten bulb draws 100 W and a compact fluorescent bulb draws 15 W. If the cost of electricity is $0.10/kWh, how long would you have to operate a compact fluorescent bulb to save $5.00 compared to the costs of operating a tungsten bulb?
Which of the following statements is not one of Newton's Laws of Motion?
A) What goes up must come down. B) The rate of change of momentum of an object is equal to the net force applied to the object. C) In the absence of a net force acting upon it, an object moves with constant velocity. D) For any force, there always is an equal and opposite reaction force.
The bright light at the center of a shadow cast by a penny
1.supports the hypothesis that light can be viewed as rays traveling in straight lines. 2.results from the re-reflection of the diffraction pattern cast by the penny. 3.is the result of the penny's shininess; it acts like a mirror providing a second source to create an interference pattern. 4.is the central maxima of the interference pattern caused by the diffraction effects around the penny.