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vagabundo [1.1K]
3 years ago
12

A winch is capable of hauling a ton of bricks vertically two stories (6.35 m ) in 24.5 s .

Physics
2 answers:
sasho [114]3 years ago
8 0

Answer:

53 % efficient

Explanation:

6.35 m converts to 20.83 ft

2000 lb (20.83 ft) / (24.5 s) = 1700 ft•lb/s

1700 ft•lb/s / (550 ft•lb/s / hp) = 3.09 hp

3.09 / 5.80 = 0.5330...

maxonik [38]3 years ago
3 0

Answer: 84 %

Explanation:

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An open pipe of length 0.39 m vibrates in the third harmonic with a frequency of 1400 Hz what is the distance from the center of
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Length of the pipe = 0.39 m

Number of harmonics = 3

Now there are 3 loops so here we can say

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3 years ago
1) Archeologists have found fossil remains of some of the first land
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Uranium 238 has a half life of 4.5 billion years. Uranium can be used to date the age of the earth. If 50% of pure uranium' is left in a sample the sample is assumed to be 4.5 billion years old.( This is assuming that the original sample was 100% uranium and no Uranium 238 has been eroded or lost in 4.5 billion years old. If a fossil has only 25 % of the Uranium 238 the sample has an estimated age of 3.2 Billion years. This would be the estimated age of the earliest life or formation of fossils.

Note no fossils contain Uranium 238. Uranium 238 is only found in igneous or volcanic rocks. So no fossils can be dated directly using U 238.

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bixtya [17]

Answer:

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