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Andru [333]
3 years ago
14

What is three sources of light

Physics
2 answers:
Artyom0805 [142]3 years ago
6 0
Sun and light bulb .........................
VARVARA [1.3K]3 years ago
4 0
Natural is sun, stars moon. Humans discovered fire, oil lamps, candles.
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Deduce the relation between kwh and joule define 1 watt​
dimulka [17.4K]

Explanation:

We know that kWh is a commercial unit of energy.

Also, 1 Joule = 1 watt × 1 seconds

1\ kWh=1kW \times 1\ h

Since ,1 h = 3600 s and 1kW = 1000 W

1\ kWh=1000\ W \times 3600\ s\\\\1\ kWh = 36\times 10^5\ W-s\\\\1\ kWh=36\times 10^5\ J

So, the relation is : 1\ kWh=36\times 10^5\ J

1 watt is defined as the power of an appliance when the energy is transferred at a rate of 1 Joule per second.

5 0
3 years ago
In this picture below, explain why the bear fell. Use FRICTION to explain your answer
jek_recluse [69]

No answer is possible, because you denied us the opportunity
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5 0
4 years ago
What do crystal of table salt look like?
Pavel [41]

They look like tiny cubes. They are in a cubic form.


6 0
4 years ago
488 J of work is done to a box which is moved across the floor for a distance of 8.9 m. What net force is required to act on the
alexira [117]

L=F*d=>F=L/d=488/8.9=54.83 N

3 0
3 years ago
The redshift of a star means that _____.
Gelneren [198K]
The correct answer is D. the star is getting farther away.

When the light has red-shifted, it shows that everything is moving away from a certain point. This is known as the Doppler effect and proves the Big Bang (which would be the center point that everything is moving away from). Just as a 'for your information', blue shift is when the star is moving towards us.

Hope I helped :)
4 0
4 years ago
Read 2 more answers
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