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aliya0001 [1]
3 years ago
6

Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. she pl

aced them on a windowsill in the sun for an hour and then measured the warmth of the air in the box. in this experiment, the time of the hour is a(n)______.
A. constant
B. independent variable
C. dependent variable
D. control
Physics
2 answers:
schepotkina [342]3 years ago
8 0
Im pretty sure its B independent variable
Anika [276]3 years ago
8 0

Answer: Independent variable

Explanation:

The time for which the different material boxes are placed in the sunlight in order to measure the warmth inside each box is independent variable.

Independent variable can be defined as the factor which can be changed based on the experiment. It does not depends on any factor.

The dependent variable depends on the independent variable and based on this the hypothesis is either rejected or accepted.

Hence, the correct answer is option B

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Mariulka [41]

Answer:

The new volume of the balloon is 8.8 L

Explanation:

Charles's Law consists of the relationship between the volume and the temperature of a certain amount of ideal gas, which is kept at a constant pressure. This law establishes that the volume is directly proportional to the temperature of the gas, that is to say that if the temperature increases, the volume of the gas increases and that on the contrary if the temperature of the gas decreases, the volume decreases.

In other words, Charles's law states that when the amount of gas and pressure are kept constant, the ratio between the volume and the temperature will always have the same value:

\frac{V}{T}=k

Having a certain volume of gas V1 that is at a temperature T1, by varying the volume of gas to a new value V2, then the temperature will change to T2, and it will be fulfilled:

\frac{V1}{T1}=\frac{V2}{T2}

In this case:

  • V1= 8.5 L
  • T1= 294 K
  • V2= ?
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Replacing:

\frac{8.5 L}{294 K}=\frac{V2}{305 K}

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<u><em>The new volume of the balloon is 8.8 L</em></u>

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