Concept explainers
(a)
The mass of the ice that melts.
(a)
Answer to Problem 20.76AP
The mass of the ice that melts is
Explanation of Solution
Given info: The mass of the copper block is
Write the expression for the change in kinetic energy of the block.
Here,
Substitute
Thus, the change in kinetic energy of the block is
Write the expression for the change in internal energy.
Here,
Substitute
Write the expression for the conservation of energy for the isolated copper ice system.
Here,
Substitute
Conclusion:
Therefore, the mass of the ice that melts is
(b)
The input energy, the change in internal energy and the change in mechanical energy for the block-ice system.
(b)
Answer to Problem 20.76AP
The input energy is
Explanation of Solution
Given info: The mass of the copper block is
The temperature of the air is
Write the expression for the change in mechanical energy of the block.
From part (a), change in kinetic energy of the block is
Substitute
Conclusion:
Therefore, the input energy is
(c)
The input energy and the change in internal energy for the ice as a system.
(c)
Answer to Problem 20.76AP
The input energy is
Explanation of Solution
Given info: The mass of the copper block is
The temperature of the ice is
From equation (1), the expression for the change in internal energy.
From part (a), the mass of the ice that melts is
Substitute
Conclusion:
Therefore, the input energy is
(d)
The mass of the ice that melts.
(d)
Answer to Problem 20.76AP
The mass of the ice that melts is
Explanation of Solution
Given info: The mass of the copper block is
Write the expression for the change in kinetic energy of the block.
Here,
Substitute
Thus, the change in kinetic energy of the block is
Write the expression for the change in internal energy.
Here,
Substitute
Write the expression for the conservation of energy for the isolated copper ice system.
Here,
Substitute
Conclusion:
Therefore, the mass of the ice that melts is
(e)
The input energy and the change in internal energy for the block of ice as a system and
(e)
Answer to Problem 20.76AP
The input energy is
Explanation of Solution
Given info: The mass of the copper block is
The temperature of the block of the ice is
From equation (1), the expression for the change in internal energy.
From part (a), the mass of the ice that melts is
Substitute
Thus, the change in internal energy for the block of ice as a system is
Write the expression for the change in mechanical energy for the block-ice system.
From part (a), change in kinetic energy of the block is
Substitute
Conclusion:
Therefore, the input energy is
(f)
The input energy and the change in internal energy for the metal sheet as a system.
(f)
Answer to Problem 20.76AP
The input energy for the metal sheet as a system is
Explanation of Solution
Given info: The mass of the copper block is
The temperature of the metal sheet is
Conclusion:
Therefore, the input energy for the metal sheet as a system is
(g)
The change in temperature of both objects.
(g)
Answer to Problem 20.76AP
The change in temperature of both objects is
Explanation of Solution
Given info: The mass of the copper slab is
Write the expression for the change in kinetic energy of the copper slab.
Here,
Substitute
Thus, the change in kinetic energy of the copper slab is
Write the expression for the change in internal energy.
Substitute
Thus, the change in internal energy of the copper slab is
Write the expression for the change in internal energy due to the temperature change.
Here,
Substitute
Conclusion:
Therefore, the change in temperature of both objects is
(i)
The input energy and the change in internal energy for the stationary slab.
(i)
Answer to Problem 20.76AP
The input energy is
Explanation of Solution
Given info: The mass of the copper slab is
The temperature of the stationary slab is
Conclusion:
Therefore, the input energy is
Want to see more full solutions like this?
Chapter 20 Solutions
Physics for Scientists and Engineers, Volume 1
- look at answer show all work step by steparrow_forwardLook at the answer and please show all work step by steparrow_forward3. As a woman, who's eyes are h = 1.5 m above the ground, looks down the road sees a tree with height H = 9.0 m. Below the tree is what appears to be a reflection of the tree. The observation of this apparent reflection gives the illusion of water on the roadway. This effect is commonly called a mirage. Use the results of questions 1 and 2 and the principle of ray reversibility to analyze the diagram below. Assume that light leaving the top of the tree bends toward the horizontal until it just grazes ground level. After that, the ray bends upward eventually reaching the woman's eyes. The woman interprets this incoming light as if it came from an image of the tree. Determine the size, H', of the image. (Answer 8.8 m) please show all work step by steparrow_forward
- Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning