Physics, 11.01.2021 17:00 tayjay95

According to the law of conservation of energy, which changes would increase the total energy of a system?

A. An addition of 400 J of GPE and a loss of 250 J of thermal energy

B. An addition of 100 J of thermal energy and a loss of 450 J of

kinetic energy

C. An addition of 200 J of kinetic energy and a loss of 250 J of

thermal energy

D. An addition of 300 J of thermal energy and a loss of 450 J of

kinetic energy

Answers: 1

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Answers

Answer from: langel7373

Correct option is (a)

Explanation:

According to conservation of energy: Total energy of system remains conserved or we can say total energy = constant

(a) 400J of GPE is added and 250J of thermal energy is lost

⇒ Total energy = 400-250 J = 150 J

hence, 150J energy is increased

(b) 100J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 100-450 J = -350 J

hence, 350J energy is decreased or lost by system

⇒ Total energy = 200-250 J = -50 J

hence, 50J energy is decreased or lost by system

(d)300J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 300-450 J = -150 J

hence, 150J energy is decreased or lost by system

Therefore, correct option is (a)

Answer from: weeblordd

Correct option is (A)

Explanation:

According to conservation of energy: Total energy of system remains conserved or we can say total energy = constant

(a) 400J of GPE is added and 250J of thermal energy is lost

⇒ Total energy = 400-250 J = 150 J

hence, 150J energy is increased

(b) 100J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 100-450 J = -350 J

hence, 350J energy is decreased or lost by system

⇒ Total energy = 200-250 J = -50 J

hence, 50J energy is decreased or lost by system

(d)300J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 300-450 J = -150 J

hence, 150J energy is decreased or lost by system

Therefore, correct option is (a)

Answer from: Quest

answer: i'm not sure which is which for i get confused on it all the time but i can tell you that the answer lies with the convex and concave devices. i hope this you. have a good day and best of luck to you!

explanation:

For which optical devices does d sometimes have a positive value?

Answer from: Quest

and 1and 1

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