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
Varvara68 [4.7K]
3 years ago
8

A proton starts from rest near the surface of a sheet of charge. It experiences a force of 14.0 microNewtons towards the sheet.

What is the surface charge density of the sheet? (Ignore the gravitational force on the proton.)
Physics
1 answer:
Naddika [18.5K]3 years ago
6 0

Answer:

The surface charge density of the sheet is 1547.516 C/m²

Explanation:

Given;

force experienced by the proton, F = 14.0 μN

Electric field near an infinite sheet with surface charge density (σ) is given as;

E = σ/2ε₀

The force of attraction the proton experienced towards the sheet;

F = Eq

F = q(σ/2ε₀) = \frac{q \sigma}{2 \epsilon_o}

where;

q is the charge of the proton

σ is the surface charge density of the sheet

ε₀ is the permittivity of free space

F = \frac{q \sigma}{2 \epsilon_o} \\\\\sigma = \frac{2F \epsilon_o}{q} \\\\\sigma = \frac{2*14*10^{-6}*8.854*10^{-12}}{1.602*10^{-19}} = 1547.516 \ C/m^2

Therefore, the surface charge density of the sheet is 1547.516 C/m²

You might be interested in
Arace car accelerates uniformly at 11.3 m/s2. If the race car starts from rest how fast will it
Ganezh [65]

Answer:

75.71 m/s

Explanation:

From equation of motion, acceleration is given by

a=\frac {v-u}{t}where v is the final velocity, u is the initial velocity and t is time taken.

Making v the subject of the above formula

v=at+u

Substituting 6.7 s for time, t and 11.3 for a and taking u as zero since it starts from rest

v=11.3*6.7=75.71 m/s

7 0
3 years ago
Why the weight of a body decreases with increases in distance from the earth's surface​
Tom [10]

because as the distance increases the gravitational force decreases so the weight of a body decreases

6 0
3 years ago
Read 2 more answers
Zeros that follow non-zero numbers and are also to the right of a decimal point are significant.
Ivenika [448]
Yes that's correct. Also zeros in between non-zero numbers are significant figures
5 0
3 years ago
Read 2 more answers
Cellus
WINSTONCH [101]

Answer:

Its initial position was 471 m.

Explanation:

We have,

Final position of the object is 327 m

Displacement of the object is -144 m

It is required to find its initial position. The difference of final and initial position is equal to the displacement of the object. So,

d=\text{final position}-\text{initial position}\\\\-144=327-\text{initial position}\\\\\text{initial position}=327+144\\\\\text{initial position}=471\ m

So, its initial position was 471 m.

5 0
3 years ago
n the figure, a uniform ladder 12 meters long rests against a vertical frictionless wall. The ladder weighs 400 N and makes an a
Leto [7]

Since the ladder is standing, we know that the coefficient of friction is at least something. This [gotta be at least this] friction coefficient can be calculated. As the man begins to climb the ladder, the friction can even be less than the free-standing friction coefficient. However, as the man climbs the ladder, more and more friction is required. Since he eventually slips, we know that friction is less than what's required at the top of the ladder.

 

The only "answer" to this problem is putting lower and upper bounds on the coefficient. For the lower one, find how much friction the ladder needs to stand by itself. For the most that friction could be, find what friction is when the man reaches the top of the ladder.

Ff = uN1

Fx = 0 = Ff + N2

Fy = 0 = N1 – 400 – 864

N1 = 1264 N

Torque balance

T = 0 = N2(12)sin(60) – 400(6)cos(60) – 864(7.8)cos(60)

N2 = 439 N

Ff = 439= u N1

U = 440 / 1264 = 0.3481

3 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the magnitude of the normal force on a 25.2 kg block in the following circumstances. (Enter your answers in N.) HINT (
    11·1 answer
  • A car that travels 200 miles North in 4 hours. What is the velocity of the in miles per hour?
    9·1 answer
  • What shape is the Milky way galaxy
    6·2 answers
  • A wave has a wavelength of 15 m and a frequency of 10 Hz. What is the speed of this wave?
    12·1 answer
  • A 55.0 kg runner who weighs 539.0 N is accelerating at 3.2 m/s2. After 2
    5·2 answers
  • What option lists the types of electromagnetic waves in order of increasing wavelength?
    8·1 answer
  • Why does the output of a microphone increase as the frequency of the sound waves which it receives increases
    10·1 answer
  • A car is moving at 20 m/s. The driver steps on the gas pedal and accelerates the car for 4 seconds at an acceleration of 4 m/s2.
    10·1 answer
  • 1. Four identical elephants are at different heights. If your physics teacher
    14·1 answer
  • In the formula V = TR, the "I" means <br>O static charge <br>O current <br>O isotope<br>O immunity​
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!