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:
Explanation:
An object is at rest along a slope if the net force acting on it is zero. The equation of the forces along the direction parallel to the slope is:
(1)
where
is the component of the weight parallel to the slope, with m being the mass of the object, g the acceleration of gravity,
the angle of the slope
is the frictional force, with
being the coefficient of friction and R the normal reaction of the incline
The equation of the forces along the direction perpendicular to the slope is
where
R is the normal reaction
is the component of the weight perpendicular to the slope
Solving for R,
And substituting into (1)
Re-arranging the equation,
This the condition at which the equilibrium holds: when the tangent of the angle becomes larger than the value of , the force of friction is no longer able to balance the component of the weight parallel to the slope, and so the object starts sliding down.