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solniwko [45]
2 years ago
10

Please help me the formula is E = P x t

Physics
1 answer:
olasank [31]2 years ago
3 0

Answer:

300J

Explanation:

300w every second so every 1 second.

300 × 1 = 300J

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Answer:

force becomes one - ninth

Explanation:

According to Coulomb's law in electrostatics, two charges can exert a force of attraction or repulsion on each other which is directly proportional to the product of two charges and inversely proportional to the square of distance between them.

Here both the charges remains same but the distance is variable.

So, we can say that

F \alpha \frac{1}{d^{2}}    .... (1)

Where d be the distance between the tow charges

As the distance between two charges increases by factor of three, let the new force be F'.

F' \alpha \frac{1}{9d^{2}}   .... (2)

Divide equation (2) by equation (1), we get

\frac{F'}{F}=\frac{d^{2}}{9d^{2}}

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2 years ago
A car accelerates from 300 km/h to 140 km/h in 2.53 seconds. what is the distance covered?
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s=25+12.5 i.e., s=37.5 m

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