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NeTakaya
3 years ago
14

How much energy must be added to a bowl of 125 popcorn kernels in order for them to reach a popping temperature of 175°C? Assume

that their initial temperature is 21°C, that the specific heat of popcorn is 1650 J/kg°C and that each kernel has a mass of 0.0001 kg
a) 124 J
b) 1200 J
c) 3176 J
d) 44210 J
Physics
1 answer:
Lisa [10]3 years ago
8 0

Answer:

c) 3176 J

Explanation:

mass of 125 popcorn = 125 x .0001 = . 0125 kg

increase in temperature =  175 - 21 = 154°C

specific heat of popcorn = 1650

heat required to increase temperature

= mass of popcorn x increase in temperature x specific heat

= .0125 x 154 x 1650

=  3176.25 J

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A 1-kilogram parcel of air is at 35°c and contains 7 grams of water vapor. What is the relative humidity?
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Answer:

20%

Explanation:

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=(0.2)×100

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3 years ago
A block of mass 0.510 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x. T
maria [59]

Answer:

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Explanation:

Using the concept of conservation of energy:

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7 0
3 years ago
Which statement is TRUE? Group of answer choices a) An object that is slowing down while traveling in the negative x-direction a
slava [35]

Answer:

d) An object that is speeding up always has a positive acceleration, regardless of the direction it travels.

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a ) a) An object that is slowing down while traveling in the negative x-direction always has a positive acceleration.

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b) An object that is speeding up while traveling in the negative x-direction always has a positive acceleration.

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6 0
2 years ago
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