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fomenos
3 years ago
10

The number 0.000402 expressed in scientific notation is

Chemistry
1 answer:
goldfiish [28.3K]3 years ago
3 0

Answer:

hope its help you

Explanation:

4.02 x 10-4

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When air pressure rapidly falls, what weather change usually occurs?
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A 45.0 g sample of a metal at 85.6 °C is placed in 150.0 g of water at 24.6 °C. The final temperature of the system is 28.3 °
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Answer:

904.014 j/kgk

Explanation:

Mass of metal = 45g

Temperature of metal = 85.6°

Mass of water = 150

Temperature of water = 24.6

Final temperature of system = 28.3

Heat lost by metal = Heat gained by water

m1 * c1 * dt = m2 * c2 * dt

Q = quantity of heat

Q = m*c*dt

dt = change in temperature

dt of water = 28.3 - 24.6 = 3.7

dt of metal = 85.6 - 28.3 = 57.3

Specific heat capacity of water, c = 4200

(45 * 10^-3) * c * 57.3 = (150 * 10^-3) * 4200 * 3.7

2.5785c1 = 2331

c1 = 2331 / 2.5785

= 904.01396

= 904.014 j/kgk

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How is heat transfer through space
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The amplitude of a wave is most directly related to what wave characteristic? Crest length
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