1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alexxx [7]
3 years ago
8

1000 kg of water initially at 6 m/s runs through a hydro-generator. If the water leaves the generator at velocity of 4 m/s, and

the efficiency of the generator is 100%, how much electricity in kJ (2 significant figures) will we get?
Physics
1 answer:
r-ruslan [8.4K]3 years ago
4 0

Answer:

8.00 kJ

Explanation:

The first thing is to determine what quantities are there.

the mass of water = 1 000 kg

initial velocity, u = 6 m/s

final velocity, v = 4 m/s

the generator is operating at 100 % efficiency, so there is no energy loss.

The kinetic energy, Ek is converted to electrical energy, therefore Ek = electrical energy.

The kinetic energy is calculated as follows:

Ek = 1/2 mv²

    = 1/2×(1 000)× (4)²

    = 8 000 J/s

    = 8.00 kJ  Ans

You might be interested in
What are the answers to the question
Vitek1552 [10]

Answer: the link isnt loading

7 0
3 years ago
How do the meetings of the words exercise and fitness differ?
ICE Princess25 [194]
Exercise is the activity and fitness is a lifestyle and done with time
7 0
3 years ago
Use the picture to answer the following question. image Which of the following will predict what would happen if the scuba tank
Ira Lisetskai [31]

Answer:

c

Explanation:

3 0
2 years ago
According to the law of conservation of momentum, the ____________________ amount of momentum of a group of objects does not cha
erica [24]
According to the law of conservation of momentum, the <u>       TOTAL         </u> amount of momentum of a group of objects does not change unless outside _____<u>FORCES</u>____ act on the objects.
8 0
3 years ago
No if radiactive plutonium is burnt in the air it produces plutonium oxide.do we expect the oxide to be radiactive
DerKrebs [107]

Answer:

A naturally radioactive element of the actinide metals series. Plutonium is used as a nuclear fuel, to produce radioisotopes for research, Plutonium dioxide is formed when plutonium or its compounds (except the phosphates) are ignited in air, and  Plutonium oxide fired at temperatures 600 C is difficult to rapidly.

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • In which country can you see the northern lights the best?
    10·1 answer
  • Which class of hard hats does not protect you from electrical shock?
    5·2 answers
  • ns:Select the correct answer. In a video game, a flying coconut moves at a constant velocity of 20 meters/second. The coconut hi
    6·1 answer
  • What is the relationship between potential and kinetic energy in chemical reactions?
    14·1 answer
  • PLZ HELP ON #22-26!!!! <br><br>Please explain why and how you got your answer.
    13·1 answer
  • (This is a non-relativistic warm-up problem, to get you to think about reference frames.) A girl throws a baseball upwards at ti
    15·1 answer
  • Ultraviolet light with a frequency of 3.00x10^15 Hz strikes a metal surface and ejects electrons that have a maximum kinetic ene
    7·1 answer
  • 20 points plz help i dont really understand how to do this
    13·1 answer
  • Anyone wanna chitchat? i'm just bored
    6·1 answer
  • What is the weight of a 63.7 kg person? ?N
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!