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
Elden [556K]
3 years ago
8

How many excess electrons are on a ball with a charge of -1.4944 10-16 C?

Physics
1 answer:
agasfer [191]3 years ago
7 0

Answer:

There are 934 excess electrons on the ball with charge -1.4944*10^(-16).

Step-by-Step Explanation:

A ball will usually be neutral and have no charge on it.

If it is negatively charged, it means there are excess electrons on it.

If we know the charge on the ball, we can count the excess no. of electrons.

We know that the charge on the ball = c = -1.4944*10^-16

Charge of one electron = e = 1.6*10^-19

Charge of n electrons on the ball = ne = c

⇒ n = c/e

n = (-1.4944*10^-16)/(1.6*10^-19)

n = 934 electrons

You might be interested in
Which of the following statements about Gaussʹs law are correct? (There may be more than one correct choice.) Question 3 options
irina1246 [14]

Answer:

If a Gaussian surface is completely inside an electrostatic conductor, the electric field must always be zero at all points on that surface.

Explanation:

Option A is incorrect because, given this case, it is easier to calculate the field.

Option B is incorrect because, in a situation where the surface is placed inside a uniform field, option B is violated

Option C is also incorrect because it is possible to be a field from outside charges, but there will be an absence of net flux through the surface from these.

Hence, option D is the correct answer. "If a Gaussian surface is completely inside an electrostatic conductor, the electric field must always be zero at all points on that surface."

3 0
3 years ago
Seattle, Washington and Bismarck, North Dakota experience very different temperatures even though they are at the same latitude.
Likurg_2 [28]

Answer:

BELOW

Explanation:

Seattle (near water) would have hotter temperatures because it is by a large body of water. Unlike Bismarck which is surrounded by land. Bismarck would get hotter. Seattle would be affected the large body of water which heats more slowly than the continent warming.

8 0
3 years ago
Read 2 more answers
A football player runs from his own goal line to the opposing team's goal line, returning to his forty-yard line, all in 22.4 s.
Bumek [7]
I assume L=120 yards as the length of the football field.

1) The average speed is given by the total distance covered by the player divided by the time taken.
The total distance covered to go from one goal line to the other and then back to the 40-yards line is
S=120y+(120-40)y=120y+80y=200 y
And the time taken is t=22.4 s, so the average speed of the player is
v= \frac{S}{t}= \frac{200 y}{22.4 s}=8.93 y/s

2) The find the average velocity, we should also consider the direction (and the sign) of the velocity.
In the the first part of the motion, the player goes from one goal line to the other one, so he covers 120 y. However, in the second part of the motion he goes back by 80 y. Therefore, the net displacement of the player is
S=120 y-80 y=40 y
and so, the average velocity is
v= \frac{S}{t}= \frac{40 y}{22.4 s}= 1.79 y/s
6 0
3 years ago
A particular automotive wheel has an angular moment of inertia of 12 kg*m^2, and is decelerated from 135 rpm to 0 rpm in 8 secon
lozanna [386]

Answer:

(A) Torque required is 21.205 N-m

(b) Wok done will be equal to 1199.1286 j

Explanation:

We have given moment of inertia I=12kgm^2

Wheel deaccelerate from 135 rpm to 0 rpm

135 rpm = 135\times \frac{2\pi }{60}=14.1371rad/sec

Time t = 8 sec

So angular speed \omega _i=135rpm and \omega _f=0rpm

Angular acceleration is given by \alpha =\frac{\omega _f-\omega _i}{t}=\frac{0-14.1371}{8}=--1.7671rad/sec^2

Torque is given by torque \tau =I\alpha

=12\times 1.7671=21.205N-m

Work done to accelerate the vehicle is

\Delta w=K_I-K_F

\Delta W=\frac{1}{2}\times 12\times 14.137^2-\frac{1}{2}\times 12\times0^2=1199.1286J

8 0
4 years ago
What is the kinetic energy of a ball at rest with a mass of 10 Kg?
xxTIMURxx [149]

Answer:

B 0j

Explanation:

It is at rest, not moving

8 0
3 years ago
Other questions:
  • Which type of solute is least likely to dissolve in water
    15·2 answers
  • Why should antibiotics be given to a person who is ill with a bacterial disease like strep throat, but NOT to a person who has a
    15·2 answers
  • At what temperature will silver have a resistivity that is two times the resistivity of iron at room temperature? (Assume room t
    14·1 answer
  • If a resource is non renewable, it ____
    6·1 answer
  • The Rank of a matrix can not be greater than the number of columns or rows
    6·1 answer
  • Two electrons are separated by 1.70 nm. What is the magnitude of the electric force each electron exerts on the other?
    11·1 answer
  • A proton and an electron are moving in the +x direction in a magnetic field in the +z
    8·1 answer
  • How do the lens of a light microscope work
    13·1 answer
  • A wheel is rotating freely at angular speed 660 rev/min on a shaft whose rotational inertia is negligible. A second wheel, initi
    15·1 answer
  • Which example below provides a complete scientific description of an object in motion?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!