Answer:
The first law of thermodynamics then reduces to
dQ = dW + dU ⇒ dU = −dW (1)
where dW is the amount of work done by the gas and dU is the change in internal energy.
Since the gas is expanding, the work being done by the gas is positive. Eqn. (1) then implies that the change in internal energy of the system must be negative, that is, the internal energy
is decreasing. The only true statements are then:
• The work done by the gas is positive, and no heat exchange occurs.
• The internal energy of the system decreases.
Answer: Preamble
Explanation:
A preamble is a first part of the constitution of every country. It is the main part of the federal and Indian constitution. It includes the purpose, philosophy and idea behind creation of a preamble. It includes the history behind development and date of implementation of the constitution. It explains the principle and signification of those principles for a country where the constitution have been applied. Indian preamble includes justice, liberty, fraternity, and equality which are necessary for maintaining equality among all citizens.
Answer:
Difference threshold
Explanation:
Difference threshold is the minimum amount that something needs to changes for a person to notice a difference 50% of the time. This concept has been applied for all area of the perception that is touch, sight smell hearing, and vision. These all areas need to be threshold before changing the threshold that a person sensed. In psycho-physical, the smallest change that is detectable changes in the stimulus or we can say that the difference between two stimuli that is noticeable that is defined as the noticeable discrimination is 75 %. It is also called the difference limen or discrimination threshold. It is also called just a noticeable threshold. It is a minimum difference in stimulation that a person can detect 50 times. We can feel the difference threshold as just a noticeable threshold.
Answer:
Autocratic leadership.
Explanation:
As the exercise suggests, autocratic leadership is most frequently mentioned in connection with the past. Many early leaders inherited their positions. They were members of the aristocracy. Through the centuries, positions of leadership were passed down to family membership. Also known as authoritarian leadership, they make all the decisions based on their judgment; rarely taking advice from followers.
