PHYSICS MIDDLE SCHOOL

· A hot, just-minted copper coin is placed in 101 g of water to cool. The watertemperature changes by 8.39°C, and the temperature of the coin changes
by 68.0°C. What is the mass of the coin?
Please helppp!!!

Answers

Answer 1
Answer:

The mass of the copper coin placed in 101g of water is 135.3g.

COLORIMETER:

The mass of the copper coin can be calculated using the following expression:

Since; Q = mc∆T

Where;

  • Q = heat absorbed or released
  • m = mass of substance
  • c = specific heat capacity of substance
  • ∆T = change in temperature
  • mc∆T (water) = mc∆T (copper)

According to the question;

COPPER METAL:

  • m = ?
  • c = 0.385 J/g°C
  • ∆T = 68°C

WATER:

m = 101g

c = 4.18 J/g°C

∆T = 8.39°C

⇒ 101 × 4.18 × 8.39 = (0.385 × m × 68)

⇒ 3542.09 = 26.18m

⇒ m = 3542.09 ÷ 26.18

⇒ m = 135.3g

Therefore, the mass of the copper coin placed in 101g of water is 135.3g.

Learn more about specific heat at: brainly.com/question/13439286

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Answer 2
Answer:

Answer:

135g

Explanation:

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Answers

Answer: 6.67 m/s

Explanation:

Recall that average speed is the total distance covered by a moving body divided by the total time taken. The SI unit is metres per second.

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