The temperature of a system must increase when heat energy is added true or false?
Answers
In fact, the temperature T of a system is directly proportional to the internal energy U of the system, and the first law of thermodynamics states that the variation of internal energy of a system is given by
where
Q is the heat added to the system
W is the work done by the system on the surroundings
We see from the formula that we have 2 possible cases:
1) the heat added to the system (Q) is greater than the work done by the system (W) -->
2) the heat added to the system (Q) is less than the work done by the system (W) -->
Therefore, it's not true that when heat is added to the system, its temperature must increase: it depends on the value of the work done, W. So, the original statement is false.
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Answers
Answers
1. The volume will increase.
2. The change in the volume is 73 mL
1. Determination of the nature of the new volume.
From the question given above, the following data were obtained:
- Initial volume (V₁) = 200 mL
- Initial temperature (T₁) = 0 °C = 0 + 273 = 273 K
- New temperature (T₂) = 100 °C = 100 + 273 = 373 K
- New volume (V₂) =?
Using the Charles' law equation, the new volume of the cylinder can be obtained as follow:
V₁ / T₁ = V₂ / T₂
200 / 273 = V₂ / 373
Cross multiply
273 × V₂ = 200 × 373
273 × V₂ = 74600
Divide both side by 273
V₂ = 74600 / 273
V₂ ≈ 273 mL
From the above calculation, we can see that the new volume increased.
2. Determination of the change in the volume.
The change in the volume can be obtained as illustrated below:
- Initial volume (V₁) = 200 mL
- New volume (V₂) = 273 mL
- Change in volume (ΔV) =?
ΔV = V₂ – V₁
ΔV = 273 – 200
ΔV = 73 mL
Learn more about Charles' law:
Answers
Answer: 2.878 parsecs
Explanation:
To convert astronomical units (AU) to parsecs (pc), you can use the following relationship:
1 parsec (pc) = 206,265 AU
Now, you can simply divide 594,000 AU by this conversion factor:
594,000 AU / 206,265 AU/pc ≈ 2.878 parsecs
So, there are approximately 2.878 parsecs in 594,000 astronomical units.
Answers
The atmosphere extend from the Earth up to 10,000 km.
What is atmosphere?
An atmosphere is the layers of gases surrounding a planet Earth. It's atmosphere is composed of about 78% nitrogen, 21% oxygen, and other gases.
Earth's atmosphere has five major layers. From lowest to highest, the layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere.
The exosphere is the topmost layer of Earth's atmosphere . It extends from the end of thermosphere, about 700 km above sea level, to about 10,000 km.
Thus, the atmosphere extend from the Earth up to 10,000 km.
Learn more about atmosphere
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The exosphere is the outermost layer of Earth's atmosphere (i.e. the upper limit of the atmosphere). It extends from the exobase, which is located at the top of the thermosphere at an altitude of about 700 km above sea level, to about 10,000 km (6,200 mi; 33,000,000 ft) where it merges into the solar wind.
Answers
Answers
Answer:
Option A
interpreting results
Explanation:
In a Scientific research, we first formulate and test hypothesis of the study. A hypothesis is a tentative guess in the study which should be validated in the process of the study. We may have a null and alternative hypothesis. After formulating the study, we conduct the actual study where we get raw data. The raw data is then analyzed, in many cases using statistical analysis tools such as R, python, excel spreadsheet etc. Therefore, the next step after formulating and objectively testing hypotheses is to interpret the results.
In the steps of the scientific method, the next step after formulating and objectively testing hypotheses is interpreting results.
Scientific method is an experimental method used in scientific research for evaluating a scientific hypothesis. The process of carrying out scientific method involves observation, then asking questions, followed by finding answers via carrying out experiments.
The steps involved in the carrying out scientific methods includes the following processes:
- observation or asking question
- research topic formulation
- formulating hypothesis
- testing hypothesis or experimentation
- interpreting or analyzing result
- report and conclusion
Therefore, we can conclude that in the steps of scientific methods, the next step after formulating hypotheses is interpreting results.
Learn more about scientific methods here: