Which of the following quantities is equal to the time constant for a charging capacitor?
a) the time it takes a capacitor to reach 33% of its maximum charge
b) the time it takes a capacitor to reach 50% of its maximum charge
c) the time it takes a capacitor to reach 66% of its maximum charge
d) the time it takes a capacitor to reach 75% of its maximum charge
e) the time it takes a capacitor to reach its maximum charge
Ans: c) the time it takes a capacitor to reach 66% of its maximum charge
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Energy Conservation With Conservative Forces: A bead is moving with a speed of 20 m/s at position A on the track shown in the figure. This track is friction-free, and there is no appreciable air resistance. What is the speed of the bead at point C?
A. 0 m/s B. 34 m/s C. 69 m/s D. 20 m/s E. We cannot solve this problem without knowing the mass of the bead.
Which of these is an inherent, unchanging property of any given solid or liquid material?
a. mass b. weight c. volume d. shape e. density
An experiment similar to the Miller-Urey Experiment was more recently done by NASA using an icy mixture of water, methanol, ammonia and carbon monoxide. The mixture was exposed to ultraviolet radiation
The results of this experiment were that no amino acids or DNA were formed, but complex organic molecules were observed. The purpose of this experiment was to determine whether: A) DNA could form from amino acids. B) DNA could form from ultraviolet radiation. C) ultraviolet radiation could create amino acids. D) amino acids could form in the harsh vacuum of outer space. E) amino acids cold form from water, methanol, ammonia and carbon monoxide.
Explain where at least three (3) possible sources of error could have occurred in this experiment