How high up the wall ladder reaches
40ft ladder makes the angle of 72 degrees as it leans against the high wall. How far from the foot of wall is ladder and how high up the wall does ladder reach.
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40ft ladder makes the angle of 72 degrees as it leans against the high wall. How far from the foot of wall is ladder and how high up the wall ladder reaches.
The most prominent line of aluminum in the line spectrum is found at 396.15nm. Determine the frequency of this line? Describe is the energy of one photon? Calculate the energy per mol?
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