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3 years ago

15. Write down your height in feet and inches):

Physics

1 answer:

Tanya [424]3 years ago

3 0

Answer:

example 5foot 5in

a)65

b)165.1

c) 1.83

Explanation:

a) multiply the amount of feet by 12. thats 60. then add the extra 5 inches. 65 inches in total.

b) multiply your previous answer by 2.54. (there are 2.54 centimeters for every inch) the answer is 165.1

c) a yard is three feet. divide 5foot 5 by 3.

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Explanation:

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3 years ago

What minimum heat is needed to bring 250 g of water at 20 ∘C to the boiling point and completely boil it away? The specific heat

Amiraneli [1.4K]

Answer:633.8 KJ

Explanation:

Given

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Specific heat of water $\left ( c \right )$ =4190 J/kg-k

heat of vaporization $\left ( L\right )=22.6\times 10^5 J/kg$

Heat required for process $\left ( Q\right )$ =heat to raise water temperature from 20 to 100 +Heat to vapourize water completely

Q=mc $\left ( T_f-T_i\right )+mL$

Q= $0.25\times 4190\times \left ( 100-20\right )+0.25\times 22\times 10^5$

Q= $\left ( 0.838+5.5\right )\times 10^5$

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4 years ago

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Jet001 [13]

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Explanation:

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4 years ago

Suppose that the average speed (vrms) of carbon dioxide molecules (molar mass 44.0 g/mol) in a flame is found to be 2.67 105 m/s

34kurt

Answer:

$T = 1.26 \times 10^8 K$

Explanation:

As we know that rms speed of ideal gas is given by the formula

$v_{rms} = \sqrt{\frac{3RT}{M}}$

here we know that

$v_{rms} = 2.67 \times 10^5 m/s$

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4 years ago

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3 years ago

Read 2 more answers