Skip to main content

Can you please help me with this problem about thermal equilibrium?

It is a common experience that when we pour hot tea in a mug, the mug gets warm and we have to hold it using its handle. This is simply because heat from the tea has been transferred to the mug. Similarly, over the course of the next few minutes, the tea and the mug get cold. This happens because the mug and the tea lose heat to the colder surroundings. 


This shows that heat...

It is a common experience that when we pour hot tea in a mug, the mug gets warm and we have to hold it using its handle. This is simply because heat from the tea has been transferred to the mug. Similarly, over the course of the next few minutes, the tea and the mug get cold. This happens because the mug and the tea lose heat to the colder surroundings. 


This shows that heat flows from a region of higher temperature to a region of lower temperature. This rule always holds true. In the present case, the plastic cup is at 70 degrees F while the water is at 40 degrees F. The heat will flow from the hotter substance to the colder substance, which means it will flow from the plastic cup to the water (in this case). The heat transfer would be faster initially, since the temperature difference is higher between the two regions. Over time, as the water's temperature goes up and that of the cup goes down, heat transfer will slow down. In the end, both the objects will come to the same temperature. That is, the water and the cup will be in thermal equilibrium.


Among the given options, choice C is correct.


Hope this helps. 

Comments

Post a Comment

Popular posts from this blog

What is the meaning of "juggling fiends" in Macbeth?

Macbeth is beginning to realize that the three witches have been deceiving him since he first encountered them. Like jugglers, they have kept changing their forecasts in order create confusion. This is particularly apparent when the Second Apparition they raise in Act IV,   Scene 1 tells him that no man of woman born can overcome him in hand-to-hand battle--and then Macbeth finds himself confronted by the one man he has been avoiding out of a... Macbeth is beginning to realize that the three witches have been deceiving him since he first encountered them. Like jugglers, they have kept changing their forecasts in order create confusion. This is particularly apparent when the Second Apparition they raise in Act IV,   Scene 1 tells him that no man of woman born can overcome him in hand-to-hand battle--and then Macbeth finds himself confronted by the one man he has been avoiding out of a sense of guilt, and that man tells him: Despair thy charm. And let the angel whom thou still hast serve...
Post a Comment
Read more

Discuss movements that were inspired by the Civil Rights Movement and list one success for each group.

African-Americans contributed in a very big way during World War II. These contributions were demonstrated at home and on the battlefield. After the war, African-Americans properly felt it was time for them to achieve equality with white Americans. During the 1950's, the modern Civil Rights Movement was born and it had a number of successes (integration of the military and Brown vs. Board of Education as examples.) This success inspired other activists to demand change... African-Americans contributed in a very big way during World War II. These contributions were demonstrated at home and on the battlefield. After the war, African-Americans properly felt it was time for them to achieve equality with white Americans. During the 1950's, the modern Civil Rights Movement was born and it had a number of successes (integration of the military and Brown vs. Board of Education as examples.) This success inspired other activists to demand change for their agendas. Two examples of moveme...
Post a Comment
Read more

What is the probability that a cross between parents who are both homozygous recessive for trait will have offspring that are homozygous recessive...

In the question, both parents are homozygous recessive for a trait. Therefore, the only genes present in each parent's genotype would be two copies of the recessive gene.  If these parents decide to have offspring, 100% of their children will inherit two recessive alleles and will express the recessive trait. An example of this can be demonstrated with the sickle cell anemia allele. If both parents have sickle cell anemia, then all of their offspring... In the question, both parents are homozygous recessive for a trait. Therefore, the only genes present in each parent's genotype would be two copies of the recessive gene.  If these parents decide to have offspring, 100% of their children will inherit two recessive alleles and will express the recessive trait. An example of this can be demonstrated with the sickle cell anemia allele. If both parents have sickle cell anemia, then all of their offspring will have the disease phenotype. The disease phenotype of sickle cell anemia re...
Post a Comment
Read more