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3 years ago

Please answer for all of these, I give brainiest! also points

Mathematics

1 answer:

elena-14-01-66 [18.8K]3 years ago

6 0

#2: 3
#4: 8
#6: 7
#8: 7
#10: -4
#12: 3
#14: -9

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A pot is being used to boil off 1 kg of water. The specific energy required to cause the phase change is 2297 kJ/kg. Assuming th

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Answer:

It will take 58 seconds

Step-by-step explanation:

If you have 1 kg of water in the jar, half of it will be 0.5 kg.

To vaporize half of the water (0.500 kg) the energy supply needed is

$2297 kJ/kg*0.5kg=1148.5 kJ$

If the stove is supplying 20 kJ/s, the time its needed is

$\frac{1148.5 kJ}{20\frac{KJ}{s} }=57.425 s$

It will last at least 58 seconds to vaporize half of the water.

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3 years ago

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Answer:

If 2/3 of the girls in class have brown eyes and 1/4 of the girls have blue eyes, what fraction of the girls in class have neither blue nor brown

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3 years ago

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Factor By Grouping x^2 -30 +225-y^2

SIZIF [17.4K]

The answer is 2x-6 I think

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3 years ago

A face of a solid is

gtnhenbr [62]

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The Second Answer , a pattern of two-dimensional shapes that can be folded to form a solid figure . 

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2 years ago

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Help me anyone that great in math

pochemuha

Answer:

B) 24/35

Step-by-step explanation:

Cos(X)= Adjacent/Hypotenuse

Cos(X) = 24/25

Therefore, option B is your answer.

Hope this answers your question!!

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2 years ago