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cricket20 [7]
3 years ago
7

Jaką masę ma ciał umieszczone na wysokości 100m, jeśli jego energia potencjalna jest równa 1 kJ? Zapisz wzór i obliczenia z jedn

ostkami
Physics
1 answer:
Debora [2.8K]3 years ago
6 0

Answer:

Masę, m = 1,02 kilograma

Explanation:

Biorąc pod uwagę następujące dane;

Wysokość = 100 m

Energia potencjalna = 1 KJ = 1000 dżuli

Wiemy, że przyspieszenie ziemskie wynosi 9,8 m/s².

Znaleźć masę obiektu;

Energię potencjalną można zdefiniować jako energię posiadaną przez obiekt lub ciało ze względu na jego położenie.

Matematycznie energia potencjalna jest określona wzorem;

P.E = mgh

Gdzie;

P.E reprezentuje energię potencjalną mierzoną w dżulach.

m reprezentuje masę obiektu.

g reprezentuje przyspieszenie ziemskie mierzone w metrach na sekundę kwadratową.

h oznacza wysokość mierzoną w metrach.

Podstawiając do wzoru, mamy;

1000 = m * 9,8 * 100

1000 = m * 980

Masę, m = 1000/980

Masę, m = 1,02 kilograma

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Pierce conducts an experiment in which waves collide in a way that the energy increases, which means that has occurred.
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It means Constructive interference has occurred.

Explanation:

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4 years ago
A geothermal power plant uses geothermal water extracted at 160°C at a rate of 440 kg/s as the heat source, and produces 22 MW o
nalin [4]

Answer:

The actual efficiency is:

n_{actual} = 2,76 %

The maximum efficiency possible is:

n_{max} = 31,18 %

The rate of heat rejection is:

Q_{rej}  = 774621,3 kW

Explanation:

Considering the specific heat of water 4,1813 KJ/kgK the energy that goes in the system is:

Q_{in} = 440 kg/s * 4,1813 KJ/kgK * 433 K = 796621,3 kW

The heat energy that goes out in an ideal situation (Tout = 25°C):

Q_{out} = 440 kg/s * 4,1813 KJ/kgK * 298 K = 548252,1 kW

The maximum heat that can be obtained is:

Q_{max}  = Q_{in} - Q_{out} = 248369,2 kW

So the maximum efficiency possible is:

n_{max} = \frac{Q_{max} }{Q_{in} } = 31,18 %

The actual efficiency is:

n_{actual} = \frac{W_{out} }{Q_{in} } = \frac{22000 kW} }{796621,3 kW } =2,76 %

Where W_{out} is the obtained work equal to 22 MW

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Answer:

the car would arrive after 10 hr to Austin.

Explanation:

bus average from amarllo to austin = 60 miles per hour

time takne by bus to reach austin = 8 hr

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from the information given in the question:

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By using The inverse variation:

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x = 10 h

the car would arrive after 10 hr to Austin.

3 0
3 years ago
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