Which of these best describes how the kinetic energy of carbon dioxide molecules change as the carbon dioxide is heated?
2 answers:
Answer: The correct answer is Option B.
Explanation:
Kinetic energy is defined as the energy which is possessed by the motion of a particle. The formula for the kinetic energy follows:
where, R = Gas Constant
T = Temperature
From above expression, kinetic energy is directly proportional to temperature of the system
As the temperature is increases, the kinetic energy of the particles also increases and vice-versa.
In the given question,
The gas (carbon-dioxide) is heated which means the temperature of the gas is increases and hence, the kinetic energy will also be increased.
Hence, the correct answer is Option B.
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Answer:
The work done by Joel is greater than the work done by Jerry.
Explanation:
Let suppose that forces are parallel or antiparallel to the direction of motion. Given that Joel and Jerry exert constant forces on the object, the definition of work can be simplified as:
Where:
- Work, measured in joules.
- Force exerted on the object, measured in newtons.
- Travelled distance by the object, measured in meters.
During the first 10 minutes, the net work exerted on the object is zero. That is:
In exchange, the net work in the next 5 minutes is the work done by Joel on the object:
Hence, the work done by Joel is greater than the work done by Jerry.
Answer:
Explanation:
As we know that train is initially moving with the speed
now we know that
now the final speed of the train when it crossed the crossing
now we can use kinematics here
Now the time to cross that junction is given as