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aev [14]
3 years ago
7

42. The number of decibels, d, produced by an audio

SAT
1 answer:
Mazyrski [523]3 years ago
8 0

Answer:

me dont know

Explanation:

me dont know

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You are given a sample of metal and asked to determine its specific heat. you weigh the sample and find that its weight is 28.4
ZanzabumX [31]

The specific heat of the given sample of metal is 14.32 J/kg.K.

<h3>What is the Specific heat of a sample?</h3>

The specific heat of a sample is the amount of heat needed or required to raise the temperature of that sample by 1K. It is given by the formula:

Q = mCΔT

where;

  • Q = Heat transferred
  • m = Mass of the substance
  • C = Specific heat
  • ΔT= Change in temperature.

Recall that:

weight of a substance = mass × gravity

  • mass = 28.4 N/ 9.8 m/s²
  • mass = 3 N/m/s² = 3 kg

From the equation:

Q = mCΔT

\mathbf{C = \dfrac{1.25 \times 10^4 \ J}{3 \ Kg \times 291  \ K }}}

C = 14.32 J/kg.K

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2 years ago
A Japanese bullet train can travel at 300km /h how long will it take to cover a section of track 180 km in length
sweet [91]

Answer:

36 minutes

Explanation:

If we assume that 180 is a fraction of 300, we can simplify it down to 18/30 and then further simplify it to 3/5 (by dividing both by the GCF, 6). It will take 3/5 of an hour for the train to travel 180 km (or 3/5 of the distance it can travel in one hour). 1/5 of an hour is equal to 12 minutes. Therefore 3/5 of an hour is 36 minutes.

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3!! 1,2,4 counting by one’s counting by 2s and 4s
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