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jolli1 [7]
4 years ago
15

A nonuniform electric field is directed along the x-axis at all points in space. This magnitude of

Physics
1 answer:
vagabundo [1.1K]4 years ago
7 0

Answer:

E) -0.28 nC

Explanation:

For using Gauss law

we calculate flux through whole cylinder.

  • On curved part flux is zero
  • On left par flux is =-\pi *0.1^{2} 2000= -20*\pi
  • On right par flux is =-\pi *0.1^{2} 1000= 10*\pi

    Total flux =-10\pi

According to Gauss law

net flux along closed surface=  \int\limits^a_b {E} \, ds=\frac{charge enclosed}{epsilon}[epsilon =8.85 *10^{-12}]

 10\pi=\frac{q enclosed}{epsilon}

plug in the values

we get charge enclosed = -0.28 nC

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An elevator car has a mass of 750 kg, and its three passengers have a combined mass of 135 kg. If the elevator and its passenger
joja [24]

Answer:

The change in gravitational potential energy is -1.80x10⁵ J.

Explanation:

The change in gravitational potential energy is given by:

\Delta E_{p} = E_{p_{f}} - E_{p_{i}}

\Delta E_{p} = mgh_{f} - mgh_{i}

Where:

"i" is for final and "f" for final

m: is the mass

g: is the gravity = 9.81 m/s²

h: is the height

For the car and the passengers we have:

\Delta E_{p} = m_{T}g(h_{f} - h_{i}) = (750 kg + 135 kg)9.81 m/s^{2}(0 - 20.7 m) = -1.80 \cdot 10^{5} J      

The minus sign is because when the elevator car and the passengers are up they have a bigger gravitational potential energy than when they are in the ground.

Therefore, the change in gravitational potential energy is -1.80x10⁵ J.

I hope it helps you!                                                

3 0
3 years ago
What are the things ships tie up to at dock?
Ratling [72]
Cleats Chicks Bits and Bollards. Hope this helps
4 0
4 years ago
If you start rolling down this hill, your potential energy will be converted to kinetic energy. At the bottom of the hill ypu KE
Serjik [45]

Answer:

v=\sqrt{(2x/m)}\  \ m/s

Explanation:

Potential Energy= Kinetic Energy

Let x be the value of Kinetic Energy.

We know that

PE=KE=x\\x=\frac{1}{2}mv^2\\

Make v the subject of the formula to get speed at the bottom of the hill.

v^2=2x/m\\v=\sqrt{2x/m}

8 0
3 years ago
Calculate the electrical energy expended in a device across which the circuit voltage drops by 20.0 volts in moving a charge of
Inga [223]

Answer:

The answer is 80 Joules

Explanation:

Electrical energy = Q x V

Energy = 2 x 40

= 80

I just took the test and it was right :D

The correct answer is B.

I hope this helped! :D

6 0
4 years ago
A vehicle that goes from 5 m/s to 45 m/s in 8 s. What is its acceleration?
WINSTONCH [101]

Answer:

5

Explanation:

a= v ÷ t which when you insert it into the equation it should be a= 40m/s ÷ 8s

7 0
2 years ago
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