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3 years ago

Pls help asap, will mark as brainliest if correct!!

Physics

1 answer:

jeyben [28]3 years ago

8 0

Answer:

PRO'S OF SOLAR ENERGY: reduced electricity bills, low maintenance cost, renewable energy source.

CONS OF SOLAR ENERGY: Cost, relies on weather, takes up a lot of space.

PROS OF WIND ENERGY: Clean environment, cost effective, Free

CON'S OF WIND ENERGY: Wind turbines are noisy, strength of wind is not always reliable

PROS OF GEOTHERMAL ENERGY: Save about 30% - 60% on heating and cooling, not weather dependent.

CONS OF GEOTHERMAL ENERGY: Greenhouse emission, high investment cost, requires a lot of land.

PROS OF BIOMASS ENERGY: Reduced dependence on fossil fuels, carbon neutral, waste reduction.

CONS OF BIOMASS ENERGY: Emissions, deforestation. cost.

PROS OF HYDROELECTRIC ENERGY: Good for the environment, reliable, efficient.

CONS OF HYDROELECTRIC ENERGY: Expensive, not always safe, you can't place hydroelectric energy anywhere you want.

***If you found my answer helpful, please give me the brainliest. :) ***

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Zinaida [17]

Answer:

$F=1.38*10^{-9}N$

Explanation:

According to Coulomb's law, the magnitude of the electric force between two point charges is directly proportional to the product of the magnitude of both charges and inversely proportional to the square of the distance that separates them:

$F=\frac{kq_1q_2}{d^2}$

Here k is the Coulomb constant. In this case, we have $q_1=-e$ , $q_2=e$ and $d=4.09*10^-10m$ . Replacing the values:

$F=\frac{8.99*10^{9}\frac{N\cdot m^2}{C^2}(-1.6*10^{-19}C)(1.6*10^{-19}C)}{(4.09*10^{-10})^2}\\F=-1.38*10^{-9}N$

The negative sign indicates that it is an attractive force. So, the magnitude of the electric force is:

$F=1.38*10^{-9}N$

5 0

3 years ago

The motor of a washing machine rotates with a period of 28 ms. What is the angular speed, in units of rad/s?

pentagon [3]

Answer:

2π/[28 x (10^-3)]

Explanation:

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3 years ago

Which of the following statements is true about scientific theories?

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<span>d. scientific theories summarize patterns found in nature

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3 years ago

A plane electromagnetic wave, with wavelength 5 m, travels in vacuum in the positive x direction with its electric vector E, of

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Answer:

Explanation:

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3 years ago