A fish is 80 cm below the surface of a pond. What is the apparent depth (in cm) when viewed from a position almost directly abov
1 answer:
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Answer:
B. QC > 0; QH < 0
Explanation:
Given that there are two reservoir of energy.
Sign convention for heat and work :
1.If the heat is adding to the system then it is taken as positive and if heat is going out from the system then it is taken as negative.
2. If the work is done on the system then it is taken as negative and if the work is done by the system then it is taken as positive.
From hot reservoir heat is going out that is why it is taken as negative
From cold reservoir heat is coming inside the reservoir that is why it is taken as positive
That is why the answer will be
,
Answer:
1)
2)displacement
3)
Explanation:
At equilibrium position the weight of the man should be balanced by force in the spring
thus we have at equilibrium
Applying values we get
2)
When we add another identical spring we get an equivalent spring with spring constant as
Applying values we get
Thus at equilibrium we have
3) Equivalent spring constant will be as calculated earlier