Answer:
Explanation:
The difference between the water level in the eudiometer tube and the water level in the beaker must be measured because we have to put into consideration, the pressure of the gases in the eudiometer tube. This said pressure of gas in the eudiometer must equal the atmospheric pressure. If or by chance, the water levels happens not to be at the same height, then this is not the case. And then, as a result, in order to account for the difference between both, while also being able to get accurate results, you have to find the difference or subtract the water levels and then go ahead in converting them to mmHg.
Answer:
A time that is less than half an hour
Explanation:
it says velocity is positive so it would yield to a negative acceleration
It says that when a small gear drives a larger gear, the output torque is increased and the output speed is decreased which is referred to as a true statement.
<h3>What is Torque?</h3>
This is referred to the force which causes an object to rotate about its axis and is equivalent to a linear force. The unit is referred to as Nm and it brings about a turning effect on the body it acts on.
In a situation whereby a small gear drives a larger gear, the output torque is increased and is accompanied with a decrease in the output speed.
This therefore makes it the most appropriate choice in this type of scenario.
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The complete question is:
It says that when a small gear drives a larger gear, output torque is increased and output speed is decreased true/false statement.
Answer: Option (A) and (D) are the correct statements.
Explanation:
Potential energy is defined as the energy obtained by an object due to its position. Whereas kinetic energy is defined as the energy obtained by an object due to the motion of its molecules.
When there will be only one phase present then addition or removal of energy will lead to change in kinetic energy of the substance but no change in potential energy will take place.
Whereas if change in phase is occurring then adding or removing any energy will lead to change in potential energy of the substance while kinetic energy will remain the same.
Thus, we can conclude that correct statements are as follows.
- While only one phase is present, adding or removing energy changes PE but not KE.
- During a phase change, adding or removing energy changes PE but not KE.