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ratelena [41]
3 years ago
15

PLEASE HELP ASAP for brainleist

Physics
1 answer:
Nutka1998 [239]3 years ago
8 0
The answer is 800 J
(the second answer).
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Charge is distributed uniformly throughout the volume of an infinitely long solid Cylinder of radius R what is the electric fiel
Arada [10]

Solution :

Let us consider the Gaussian surface that is in the form of a cylinder having a radius of r and a length of A which is $\text{coaxial with the charged cylinder}$.

The charged enclosed by the cylinder is given by,

$q=\rho V$       (here, V = $\pi r^2l$  is the volume of the cylinder)

  $=\pi r^2lp$    

If $\rho$ is positive, then the electric field lines moves in the radial outward direction and is normal to Gaussian surface which is distributed uniformly.

Therefore, total flux through Gaussian cylinder is :

$\phi=EA_{cyl}$

   $=E(2\pi rl)$

Now using Gauss' law, we get

$2\pi \epsilon_0rlE = \pi r^2lp$

or $E=\frac{\rho r}{2 \epsilon_0}$

Therefore, the electric field is $E=\frac{\rho r}{2 \epsilon_0}$

Hence, option (d) is correct.

8 0
3 years ago
- Find the velocity of a wave in the ocean if the wavelength is 2.0m and the frequency is 0.56Hz.
pentagon [3]
1.12 m/s is the velocity. You can get the velocity of a wave by multiplying the frequency and wavelength together. The product is the velocity.
6 0
3 years ago
The number of times a machine multiplies the effort force is?
Nataly_w [17]
Mechanical advantage is a force which is measure of a force amplifying effectiveness of a simple machine.so t<span>he number of times a machine multiplies the effort force is mechanical advantage .
hope this helps</span>
4 0
3 years ago
When is a secondary source more helpful than a primary source?
UNO [17]

Answer:

I think the answer is C.

Explanation:

A primary source is a first hand account of an event while a secondary source is a retelling or second hand account meaning as many details will be prevalent.

8 0
2 years ago
Which cart has the greatest kinetic energy?
Lyrx [107]

We will individually calculate the Kinetic Energy of each of the carts and compare them

<u>Cart A:</u>

m = 1 kg  ,   v = 3 m/s

KE = 1/2 mv²

KE = 9/2 = 4.5 J

<u>Cart B:</u>

m = 3 kg  ,  v = 1m/s

KE = 1/2 mv²

KE = 3/2 = 1.5 J

<u>Cart C:</u>

m = 3 kg   ,   v = 2 m/s

KE = 1/2 mv²

KE = 6 J

<u>Cart D:</u>

m = 4 kg   ,   v = 2 m/s

KE = 1/2 mv²

KE = 2 J

Therefore, Cart C has the most Kinetic energy

3 0
3 years ago
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