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3 years ago

As you move away from a positive charge distribution, the electric field:

Physics

1 answer:

GalinKa [24]3 years ago

3 0

Answer:

The electric field always decreases.

Explanation:

The electric field due to a point charge is given by :

$E=\dfrac{kq}{r^2}$

Where

k = electric constant

q = charge

r = distance from the charge

It is clear from the above equation that as the distance from the charge particle increases the electric field decreases. As you move away from a positive charge distribution, the electric field always decreases. Hence, the correct option is (c) "Always decreases".

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How many chromosomes does a human diploid cell have

geniusboy [140]

Answer:

Explanation:

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3 years ago

Difference between freefall and weightlessness.

Margaret [11]

Answer:

Differences between freefall and weightlessness are as follows:

<h3><u>Freefall</u></h3>

When a body falls only under the influence of gravity, it is called free fall.
Freefall is not possible in absence of gravity.
A body falling in a vacuum is an example of free fall.

<h3><u>Weightlessness</u></h3>

Weightlessness is a condition at which the apparent weight of body becomes zero.
Weightlessness is possible in absence of gravity.
A man in a free falling lift is an example of weightlessness.

Hope this helps....

Good luck on your assignment....

6 0

3 years ago

Exercise 1 - Questions 1. Hold the grating several inches from your face, at an angle. Look at the grating that you will be usin

choli [55]

Answer:

1) on the surface you can see the slits with equal spacing, on the one hand and on the other hand it is smooth.

2)If the angle is zero we see a bright light called undispersed light

For different angles we see the colors of the spectrum

3) must be able to see the well-collimated light emission source

Explanation:

1) A diffraction grating (diffraction grating) is a surface on which a series of indentations are drawn evenly spaced.

These crevices or lines are formed by copying a standard metal net when the plastic is melted and after hardening is carefully removed, or if the nets used are a copy of the master net.

The network can be of two types of transmission or reflection, in teaching work the most common is the transmission network, on the surface you can see the slits with equal spacing, on the one hand and on the other hand it is smooth.

The number of lines per linear mm determines which range of the spectrum a common value can be observed to observe the range of viable light is 600 and 1200 lines per mm.

2) when looking through the diffraction grating what we can observe depends on the relative angle between the eye and the normal to the network.

If the angle is zero we see a bright light called undispersed light

For different angles we see the colors of the spectrum, if it is an incandescent lamp we see a continuum with all the colors in the visible range and if it is a gas lamp we see the characteristic emission lines of the gas.

3) Before mounting the grid on the spectrometer, we must be able to see the well-collimated light emission source, this means that it is clearly observed.

The spectrometers have several screws to be able to see the lamp clearly, this is of fundamental importance in optical experiments.

3 0

4 years ago

A solid cylinder is released from the top of an inclined plane of height 0.50 m. From what height, in meters, on the incline sho

dangina [55]

Answer:

Explanation:

for rolling motion down the plane acceleration is given by the following expression

a = g sinθ / (1 + k² / R²)

here k is radius of gyration and R is radius of the object rolling down .

for cylinder I = 1/2 m R²

so k² = R² / 2

k² / R² = 1/2

a = g sinθ /( 1 + 1 / 2 )

= 2 / 3 x g sinθ

v = √ 2 a s

= √ (2 x 2 / 3 x g sinθ s )

= √ (4 / 3 x g h )

= √ (4 / 3 x g x .5 )

= √ 2g / 3

for sphere I = 2/5 m R²

so k² = 2/5 R²

k² / R² = 2 / 5

a = g sinθ / (1 + 2 / 5)

= 5 / 7 x g sinθ

v = √ 2 a s

= √ (2 x 5 / 7 x g sinθ s )

= √ (10/7 x g h )

Given

√ (10/7 x g h ) = √ 2g / 3

10/7 x g h = 2g / 3

h = 14 / 30 m

= .47 m .

5 0

3 years ago

The Achilles tendon connects the muscles in your calf to the back of your foot. When you are sprinting, your Achilles tendon alt

drek231 [11]

Answer:

5 mm

Explanation:

Youngs's modulus (Y) is described by the following expression:

$Y=\frac{F*L}{\Delta L*A}$

Where F is the force exerted on the tendon, L is its length, A is its area and ΔL is its change in length (stretching).

The force in this case is 8 times the weight of the runner:

$F= 8*m*g\\F= 8*70*9.8\\F=5488 N$

Therefore, the change in length of the tendon is given by:

$\Delta L=\frac{F*L}{Y*A}\\\Delta L=\frac{5488*0.15}{0.15*10^{10}*1.1*10^{-4}}\\\Delta L= 0.004989 m$

the runner's Achilles tendon will stretch by 0.004989 m, which is roughly 5 mm.

8 0

3 years ago