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DiKsa [7]
3 years ago
10

In and electric circuit, where do the electrons come from that flow in the circuit

Physics
2 answers:
Firdavs [7]3 years ago
7 0
The electrons are already there. They are freely moving through the conductor.
PSYCHO15rus [73]3 years ago
4 0
The excess electrons come from the battery, power supply, solar cell etc that makes the circuit operate.
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Please help on this one?
bezimeni [28]

Using the given equation you get:

E = 1.99x10^-25 / 9.0x10^-6

Divide 1.99 by 9.0: 1.99/9.0 = 0.22

For the scientific notation, when dividing subtract the two exponents:

25 -6 = 19

So you now have 0.22 x 10^-19

Now you need to change the 0.22 to be in scientific notation form:

2.2 x 10^-20

The answer is B.

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Which vehicle will have more kinetic energy, a parked<br> semitruck or a car moving at 50 km/h?
Neporo4naja [7]

Answer:

a semi truck

Explanation:

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The answer is the second option, or 1/10 the same momentum.

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3 years ago
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A 10kg oil is heated by a source of heat that supplies 800J of heat every minute. Calculate The heat added to oil after 30 minut
goblinko [34]

Answer:

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Explanation:

The specific heat capacity of a material is the energy required to raise one kilogram (kg) of the material by one degree Celsius (°C). The specific heat capacity of water is 4,200 joules per kilogram per degree Celsius (J/kg°C). This means that it takes 4,200 J to raise the temperature of 1 kg of water by 1°C.

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Explanation:

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