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luda_lava [24]
3 years ago
14

Accurate forecasts require careful study of the location, size, movement, and characteristics of large _____.

Physics
1 answer:
tankabanditka [31]3 years ago
3 0

Answer: B air masses

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What type of device forms images by changing the speed at which light
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Any Lens

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Please help me with these questions... I really need help..
attashe74 [19]
45) B) Vaporizing water at its boiling point

46) D) There is no change in temperature 

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3 years ago
A certain humidifier operates by raising water to the boiling point and then evaporating it. Every minute 30 g of water at 20◦ C
Sveta_85 [38]

Answer:

The value of total energy needed per minute for the humidifier = 77.78 KJ

Explanation:

Total energy per minute the humidifier required = Energy required to heat water to boiling point) + Energy required to convert liquid water into vapor at the boiling point) ----- (1)

Specific heat of water = 4190 \frac{J}{kg k}

The heat of vaporization is =  2256 \frac{KJ}{kg}

Mass = 0.030 kg

Energy needed to heat water to boiling point =  m c ( T_{2} - T_{1} )

Energy needed to heat water to boiling point = 0.030 × 4.19 × (100 - 20)

Energy (E_{1}) = 10.08 KJ

Energy needed to convert liquid water into vapor at the boiling point

E_{2} = 0.030 × 2256 = 67.68 KJ

Thus the total energy needed E =  E_{1} + E_{2}

E = 10.08 + 67.68

E = 77.78 KJ

This is the value of total energy needed per minute for the humidifier.

9 0
4 years ago
2. What is the percent composition of sulfur in H2SO4?
allochka39001 [22]

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C. 32.7%

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alexandr1967 [171]

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