1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Yuki888 [10]
3 years ago
6

A parallel plate capacitor has circular plates with diameter D 21.5 cm separated by a distance d 1.75 mm. When a potential diffe

rence of AV= 12.0 V is applied across the plates, what is the energy density u between the plates? 9. a) u 0.0132 J/cm u=52.0 J/cm3 b) c) u= 127 J/cm2 u=208 J/cm2 d) =
Physics
1 answer:
kow [346]3 years ago
8 0

Answer:

energy density is 2.08 ×10^{-4} J/m³

Explanation:

given data

diameter D = 21.5 cm

distance d = 1.75 mm

potential difference V = 12.0 V

to find out

energy density u

solution

first we will apply here formula for electric field that is

electric field = potential difference / distance   ....................1

put here all value in equation 1 we get electric field

electric field = 12 / 1.75 ×10^{-3}

electric field = 6.857 ×10^{3}  N/C

so energy density will be

energy density = 1/2 × ∈ × E²   .............................2

put here all value and  ∈ = 8.85 ×10^{-12}

energy density = 1/2 × 8.85 ×10^{-12} ×  (6.857 ×10^{3})²

so energy density = 2.08 ×10^{-4} J/m³

You might be interested in
A 50.0-kg block is being pulled up a 13.0° slope by a force of 250 N which is parallel to the slope, but the block does not slid
Elan Coil [88]

<span>Weight of block, Wb = mass*gravity = 50*9.8 = 490 N</span>

Since block is being pulled up by a 13-degree slope

Therefore, Force which is acting parallel to the slop:

<span> F p =490 Sin </span>13^{0}= 110.2N

Force which is acting perpendicular to the slope:

<span> Fv =490 Cos</span>13^{0} = 477.4 N

Net force can be given as follows:

<span>F n = (250 - 110.2 - 0.2*</span>477.4) N

<span>Fn=44.3N</span>

Now acceleration is given by the ratio of force to mass

<span>a = Fn/m</span>

<span>=44.3/50 = 0.89 ms^<span>-2</span></span>

8 0
3 years ago
A positively charged plastic ruler is brought close to a piece paper resting on the desk. The piece of paper was initially neutr
stealth61 [152]

Answer: static electricity

Explanation:

When the plastic ruler is rubbed, friction opposes the motion and causes the transfer of electron from one surface to another such that plastic becomes negatively charged. When ruler is brought nearer to the paper, it induces the   positive charge in the piece of paper.

4 0
3 years ago
You fire a paintball from a paintball gun straight up into the air at 25.0 m/s. What is the ball velocity at the higher point th
iVinArrow [24]

Given :

You fire a paintball from a paintball gun straight up into the air at 25.0 m/s.

To Find :

What is the ball velocity at the higher point that the ball reaches.

Solution :

We know, when ball is moving upward acceleration due to gravity is applied downward.

So, the ball will decelerate and when ball reaches maximum height its velocity will become zero.

Therefore, ball velocity is 0 m/s at maximum height.

Hence, this is the required solution.

5 0
3 years ago
Which of the following has potential but not kinetic energy?
joja [24]

Answer:

<h2>D.)</h2>

Explanation:

Potential energy is when a object is not in motion and the ball is sitting on a shelf not being thrown around or rolling. kinetic energy is when a obeject is in motion and moving.

4 0
3 years ago
Read 2 more answers
A 4.00 kg stone is dropped from a height of 145 m. What is the stone’s potential and kinetic energy respectively when it is 50.0
Lorico [155]

Answer:

C - 3,720 J, 1,950 J

Explanation:

Hello

Epotential = M*G*H

Ep = (4)(9.8)(145-50)

Ep = 3729 J

Then

Ec = 1950 J

Best regards

6 0
3 years ago
Other questions:
  • A car started from a rest and accelerated at 9.54 m/s2 for 6.5 seconds. How much distance was covered by the car?
    8·1 answer
  • A power source supplies a prescribed voltage and is used to power a light bulb if another light bulb is connected in series to t
    8·2 answers
  • Is glass weigh more than wood
    10·2 answers
  • A young woman named kathy kool buys a sports car that can accelerate at the rate of 5.37 m/s 2 . she decides to test the car by
    14·2 answers
  • The force it would take to accelerate a 700-kg car at a rate of 5 m/s2 is
    9·1 answer
  • Jenny and Betty are having a great time at Busch Gardens riding the Ubanga Banga bumper cars. Jenny, who is traveling southward
    9·2 answers
  • The time required from the passing of one crest to the next is called the wave's
    9·1 answer
  • A 12.9 kg pelican, with a 1.51 kg fish in its mouth, is flying 14.94 m/s at a height of 114 m when the fish wiggles free and fal
    15·1 answer
  • A 215 N sign is supported by two ropes. One rope pulls up and to the right 1=29.5∘ above the horizontal with a tension 1 , and t
    6·1 answer
  • Recall that impulse = momentum (FAt = Ap and that Ap is just mx v). How long (time) must a group of people pull with a force of
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!