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3 years ago

HELP ME DO THIS QUESTION PLEASE

Physics

1 answer:

raketka [301]3 years ago

7 0

Answer:

i dont know

Explanation:

but what you can do is ask you mom or dad to get you a tutor to help you

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Anwser, this picture

Ipatiy [6.2K]

To the picture , hello how are you mr picture !

5 0

3 years ago

A parallel-plate capacitor in air has a plate separation of 1.76 cm and a plate area of

Monica [59]

Answer:

Explanation:

Plate separation, d = 1.76 cm = 0.0176 m

Area of plates, A = 25 cm^2 = 0.0025 m^2

V = 255 V

(a) Capacitance of capacitor

$C = \frac{\epsilon _0A}{d}$

$C = \frac{8.854\times 10^{-12}\times 0.0025}{0.0176}$

C = 1.258 x 10^-12 F

charge is same before and after immersion as the battery is disconnected

q = C V

q = 1.258 x 10^-12 x 255 = 3.2 x 10^-10 C

(b)

Capacitance before, C = 1.258 x 10^-12 C

capacitance after, C' = k x C = 80 x 1.258 x 10^-12 = 100.64 x 10^-12 C

Where, k is the dielectric constant of water = 80

Potential difference after immersion, V' = V / k = 255 / 80 = 3.1875 V

$U = \frac{q^{2}}{2C}$

$U = \frac{(3.2\times 10^{-10})^{2}}{2\times 1.258\times 10^{-12 }}=4.07\times 10^{-8}J$

Final energy

$U' = \frac{q^{2}}{2C'}$

$U' = \frac{(3.2\times 10^{-10})^{2}}{2\times 100.64\times 10^{-12}}=5.08\times 10^{-10}J$

6 0

3 years ago

Can somone pls help me??!! i’m very stuck

natima [27]

Answer:

graph b

Explanation:

graph a isnt constant

graph c is slower (less steep slope)

graph d is slowing down (starts high ends low)

5 0

3 years ago

if 500 watts hit the surface of a solar panel every second and it generates 150 watts every second, how efficient is it?

alukav5142 [94]

The electrical efficiency is defined as the ratio between the useful power output and the total power input:
$\epsilon = \frac{P_{out}}{P_{in}}$

In our problem, $P_{out} = 150 W$ (power generated by the solar panel) and $P_{in} = 500 W$ (power hitting the surface of the solar panel), therefore the efficiency of the panel is
$\epsilon = \frac{150 W}{500 W}=0.3$
which corresponds to 30%.

4 0

3 years ago

3. Does the Sun's light that reaches Earth produce a true continuous rainbow? If not, what colors

dangina [55]

Answer:

when there is no water in the atmosphere or when no drops are formed there is no rainbow..

he hydrogen transition lines would be missing in the visible range, the RED region

Explanation:

The sunlight that reaches the Earth is scattered by the atmosphere and radiated, as the atmosphere has mainly nitrogen, the radiated light is blue, this light does not produce a rainbow.

The sunlight must reach a drop of water that disperses the colors according to the refractive index of the water and in this way produces a rainbow, so when there is no water in the atmosphere or when no drops are formed there is no rainbow..

If the atmosphere were composed of Hydrogen, the hydrogen transition lines would be missing in the visible range, this corresponds to the so-called Balmer series and they are in the RED light region.

8 0

4 years ago

HELP ME DO THIS QUESTION PLEASE ​

HELP ME DO THIS QUESTION PLEASE