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3 years ago

Help please! Will give brainly! and thanks.

Physics

1 answer:

kipiarov [429]3 years ago

7 0

<h2>Answer:</h2>

All the energy sources are correctly matched with their category.

Explanation:

Renewable energy sources:

These are energy sources which can be replenished as they don't in involves the irreversible phase change.

These resources can never be ended as they can be used again and again.

Wind, geothermal, biomass, bio gas are example of renewable energy sources.

Non renewable energy sources:

These are the energy source which can never be replenished after one time use. They undergo the chemical irreversible change.

These sources are lacking with the passage of time because they can never be reused.

Oil, gas, coal and natural gas are examples.

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The plate area is doubled, and the plate separation is reduced to half its initial separation. What is the new charge on the neg

Norma-Jean [14]

Answer:

Q = 4 Q₀

Explanation:

This is an exercise on capacitors, where the capacitance is

C = $\epsilon_{o} \ \frac{A}{d}$

if we apply the given conditions

C = \epsilon_{o} \ \frac{2A}{0.5d}

C = 4 \epsilon_{o} \ \frac{A}{d}

let's call the capacitance Co with the initial values

C₀ = \epsilon_{o} \ \frac{A}{d}

C = 4 C₀

The charge on each plate of a capacitor is

Q = C ΔV

If the potential difference is maintained, the new charge is

Q = 4 C₀ ΔV

let's call

Q₀ = C₀ ΔV

we substitute

Q = 4 Q₀

5 0

2 years ago

A negatively charged balloon has 4 μC of charge. How many excess electrons are on this bal- loon? The elemental charge is 1.6 ×

bagirrra123 [75]

Data:

The charge of a body depends on the amount of electrons it gains or loses. Q = n * e, where "Q" is charge, "n" is the number of plus or minus electrons, and "e" is the fundamental charge of an electron $1,6 * 10 ^{-19}C$ <span>. To know if the body has gained or lost, we look at the signal of its charge, remembering that the electron is negative. The charge of the body is 4 μC (positive), so there is a lack of electrons!

Q = 4 </span>μC → $Q = 4*10^{-6}$
$e = 1,6 * 10 ^{-19}C$
$n = ?$ <span>

We have:
</span> $Q = n*e$
$n = \frac{Q}{e}$
$n = \frac{4*10^{-6}}{1,6 * 10 ^{-19}}$
$n = 2,5*10^{-6-(-19)}$
$n = 2,5*10^{-6+19}$
$\boxed{n = 2,5*10^{13}electrons}$

7 0

3 years ago

You dip your finger into a pan of water twice each second, producing waves with crests that are separated by 0.15 m. Determine t

PIT_PIT [208]

Frequency = rate of sploosh = 2 per second = 2 Hz.

Period = ( 1/frequency ) = 1/2 second

Speed = (wavelength) x (frequency) = (0.15m) x ( 2/sec) = 0.075 m/s .

5 0

3 years ago

If the tension in the rope is 160 n, how much work does the rope do on the skier during a forward displacement of 270 m?

Lunna [17]

If the tension in the rope is 160 n, - 43200 J work doen by the rope on the skier during a forward displacement of 270 m.

Given,

Tension force in the rope is (T) = 160 N

Displacement of the skier (S) = 270 m

The displacement takes place in forward direction while the direction of the tension in the rope is opposite to it.

Therefore, work done by the rope on the skier is,

$W=T.S$