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Anna35 [415]
3 years ago
10

A girl weighing 500 Newtons takes 50 seconds to climb a flight of stairs 18 meters

Physics
1 answer:
maxonik [38]3 years ago
8 0

Answer:

180Watts

Explanation:

Power = Force * distance/Time

Given

Force = 500N

Distance = 18m

Time t = 50secs

Substitute into the formula

Power = 500*18/50

Power = 10 * 18

Power = 180Watts

Hence her power output vertically is is 180Watts

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Answer:

  1. solution,
  2. Given
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Explanation:

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The ceiling of your lecture hall is probably covered with acoustic tile, which has small holes separated by about 5.9 mm. Using
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\frac{x}{L}=1.22\frac{\lambda}{D}\\\Rightarrow L=\frac{xD}{1.22\lambda}\\\Rightarrow L=\frac{5.9\times 10^{-3}\times 5\times 10^{-3}}{1.22\times 527\times 10^{-9}}\\\Rightarrow L=45.88297\ m

A person could be 45.88297 m from the tile and still resolve the holes

Resolving them better means increasing the distance between the observer and the holes. It can be seen here that the distance is inversely proportional to the wavelength. Violet has a lower wavelength than red so, violet light would resolve the holes better.

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Which wave characteristic determines color?
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A 1500 kg car is parked at the top of a hill 5.2 m high. At the bottom of the hill, what is the kinetic energy, in Joules, of th
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