Electric field is proportional to the charge and inversely proportional to the square of distance:
With charge 2q and distance 2r, the electric field is proportional to:
The new electric field is half of that of the original measured field.
Answer:
a. -4.166 J/K
b. 8.37 J/K
c. 4.21 J/K
d. entropy always increases.
Explanation:
Given :
Temperature at hot reservoir , 
= 720 K
Temperature at cold reservoir , 
= 358 K
Transfer of heat, dQ = 3.00 kJ = 3000 J
(a). In the hot reservoir, the change of entropy is given by:
(the negative sign shows the loss of heat)
= -4.166 J/K
(b) In the cold reservoir, the change of entropy is given by:
= 8.37 J/K
(c). The entropy change in the universe is given by:
= -4.16+8.37
= 4.21 J/K
(d). According to the concept of entropy, the entropy of the universe is always increasing and never decreasing for an irreversible process. If the entropy of universe decreases, it violates the laws of thermodynamics. Hence, in part (c), the result have to be positive.
When the image distance is positive, the image is on the same side of the mirror as the object, and it is real and inverted. When the image distance is negative, the image is behind the mirror, so the image is virtual and upright. A negative m means that the image is inverted. Positive means an upright image.
Elapsed Time=Time(final)-Time(initial)
The elapsed time for Trial B is 3 seconds.
Average speed=distance traveled/elapsed time
The average speed for Trial B is 1.3 m/s.
hope i helped
One advantage of using primary sources when doing research on an experiment is, it contain more details about the experiment. Thus, option D is right .
To find the answer, we have to know more about the Primary sources.
<h3>
What is the advantages of primary sources?</h3>
- Primary sources are the direct or first-hand excerpts that scientists have independently written based on their experiments in order to support their research.
- Utilizing original sources encourages analytical and critical thought in relation to the research.
- It aids in exploring from various angles, which leads to the discovery of extra facts.
- Primary data aids in navigating the conflicts. Since it is a direct resource related to the experiment, it serves as evidence for the data.
Thus, we can conclude that, Primary sources contain more details about the experiment.
Learn more about the Primary sources here:
brainly.com/question/24190082
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