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Serggg [28]
3 years ago
12

calculate the electric field strength between two parallel plates separated by 0.50 cm, across which is a potential of 12 volts.

Physics
1 answer:
Alexxandr [17]3 years ago
3 0
Formula for Electric Field strength , E =  V/d

where V = Voltage in volts, and d = distance of separation in meters.

d = 0.5 cm = 0.005 m,    V = 12 V

E = V/d =  12 / 0.005

E = 2400

Electric Field Strength = 2400 Volts/meter 
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Which circuit offers the greater resistance to the battery, two bulbs in series or two bulbs in parallel?
dolphi86 [110]

The resistance of two things in series is the SUM of their individual resistances.  So the resistance of two bulbs in series is <u><em>double</em></u> the resistance of one bulb.

(If they're in parallel, their combined resistance is <u><em>1/2</em></u> the resistance of one bulb.)

So two bulbs <em>in series</em> is the greater resistance. <em>(a) </em>

7 0
3 years ago
The wavelength of red helium-neon laser light in air is 632.8 nm.
e-lub [12.9K]

(a) 4.74\cdot 10^14 Hz

The frequency of an electromagnetic wave is given by:

f=\frac{c}{\lambda}

where

c=3.0\cdot 10^8 m/s is the speed of the wave in a vacuum (speed of light)

\lambda is the wavelength

In this problem, we have laser light with wavelength

\lambda=632.8 nm=6.33\cdot 10^{-7} m. Substituting into the formula, we find its frequency:

f=\frac{3.0\cdot 10^8 m/s}{6.33\cdot 10^{-7} m}=4.74\cdot 10^14 Hz

(b) 427.6 nm

The wavelength of an electromagnetic wave in a medium is given by:

\lambda=\frac{\lambda_0}{n}

where

\lambda_0 is the original wavelength in a vacuum (approximately equal to that in air)

n is the index of refraction of the medium

In this problem, we have

\lambda_0=632.8 nm

n = 1.48 (index of refraction of glass)

Substituting into the formula,

\lambda=\frac{632.8 nm}{1.48}=427.6 nm

(c) 2.03\cdot 10^8 m/s

The speed of an electromagnetic wave in a medium is

v=\frac{c}{n}

where c is the speed of light in a vacuum and n is the refractive index of the medium.

Since in this problem n=1.48, we find

v=\frac{3\cdot 10^8 m/s}{1.48}=2.03\cdot 10^8 m/s

3 0
4 years ago
HELP PLEASE
lisabon 2012 [21]

Sustainable buildings are generally less expensive over the lifetime of the building, due to lower energy costs in production of the materials and lower energy bills. Option A is correct.

<h3>What is sustainable buildings? </h3>

Sustainable buildings refer to both a structure and the implementation of environmentally responsible and resource-efficient methods.

Sustainable buildings are generally less expensive over the lifetime of the building, due to lower energy costs in production of the materials and lower energy bills,

Hence,option A is correct.

To learn more about the sustainable buildings, refer;

brainly.com/question/8434592

#SPJ1

5 0
2 years ago
The cornea behaves as a thin lens of focal lengthapproximately 1.80 {\rm cm}, although this varies a bit. The material of whichi
Keith_Richards [23]

Answer:

Explanation:

  a )

from lens makers formula

\frac{1}{f} =(\mu-1)(\frac{1}{r_1} -\frac{1}{r_2})

f is focal length , r₁ is radius of curvature of one face and r₂ is radius of curvature of second face

putting the values

\frac{1}{1.8} =(1.38-1)(\frac{1}{.5} -\frac{1}{r_2})

1.462 = 2 - 1 / r₂

1 / r₂ = .538

r₂ = 1.86 cm .

= 18.6 mm .

b )

object distance u = 25 cm

focal length of convex lens  f  = 1.8 cm

image distance  v   = ?

lens formula

\frac{1}{v} - \frac{1}{u} = \frac{1}{f}

\frac{1}{v} - \frac{1}{-25} = \frac{1}{1.8}

\frac{1}{v} = \frac{1}{1.8} -\frac{1}{25}

.5555 - .04

= .515

v = 1.94 cm

c )

magnification = v / u

= 1.94 / 25

= .0776

size of image = .0776 x size of object

= .0776 x 10 mm

= .776 mm

It will be a real image and it will be inverted.

 

5 0
3 years ago
Which image illustrates refraction
photoshop1234 [79]

Answer:

it loaded and it is C. buddy sorry about that :)

4 0
4 years ago
Read 2 more answers
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