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
Leni [432]
3 years ago
5

A metal sphere with radius ra = 1.30cm is supported on an insulating stand at the center of a hollow, metal, spherical shell wit

h radius rb = 9.90cm . Charge +q is put on the inner sphere and charge ?q on the outer spherical shell. The magnitude of q is chosen to make the potential difference between the spheres 480V , with the inner sphere at higher potential.
Part A

Calculate q.
q =................C
Physics
1 answer:
notsponge [240]3 years ago
7 0

Answer:

7.9902734304\times 10^{-10}\ C

Explanation:

k = Coulomb constant = 8.99\times 10^{9}\ Nm^2/C^2

r_1 = 1.3 cm

r_2 = 9.9 cm

V = Voltage = 480 V

Potential difference is given by

V=kq(\dfrac{1}{r_1}-\dfrac{1}{r_2})\\\Rightarrow q=\dfrac{V}{k(\dfrac{1}{r_1}-\dfrac{1}{r_2})}\\\Rightarrow q=\dfrac{480}{8.99\times 10^{9}\times(\dfrac{1}{0.013}-\dfrac{1}{0.099})}\\\Rightarrow q=7.9902734304\times 10^{-10}\ C

The charge is 7.9902734304\times 10^{-10}\ C

You might be interested in
Which atomic model was proposed as a result of j. J. Thomson’s work?
EleoNora [17]
<h2>Answer: The "raising pudding" atomic model</h2>

Explanation:

<u>During the 19th century the accepted atomic model, was Dalton's atomic model</u>, which postulated the atom was an <u>"individible and indestructible mass".</u>

However, at the end of 19th century J.J. Thomson began experimenting with cathode ray tubes and found out that atoms contain small subatomic particles with a negative charge (later called <u>electrons</u>).  This meant the atom was not indivisible as Dalton proposed. So, Thomson developed a new atomic model.

Taking into consideration that at that time there was still no evidence of the atom nucleus, Thomson thought the electrons (with negative charge) were immersed in the atom of positive charge that counteracted the negative charge of the electrons. <u>Just like the raisins embedded in a pudding or bread. </u>

That is why this model was called the <u>raisin pudding atomic model.</u>

4 0
4 years ago
You stand on a spring scale on the floor of an elevator. Of the following, the scale shows the highest reading when the elevator
Virty [35]

Answer:

move upward with increasing speed

I draw fbd diagram , see in figure

when lift going upward -

F - mg = ma

f = m( a + g)

scale so highest reading

5 0
4 years ago
One of the reasons you love your home is because every side of your home faces South. One day, while talking on the phone, you h
ExtremeBDS [4]

The bear is white in color because it is a polar bear.

<h3>What are the color of bears?</h3>

Bears are very large carnivorous animals found around the cold regions of the Arctic or North Pole.

The color of bears, may be brown, black or white depending on how far North the bears are found.

Bears found close to the Arctic or North pole are white polar bears.

Based on the description of the house, every side of the home faces South meaning that the individual lives in the North pole.

Therefore, the color of the bear will be white.

in conclusion, polar bears are white in color.

Learn more about polar bears at: brainly.com/question/21618662

#SPJ1

8 0
2 years ago
How does Newton's third law of motion give a property of process​
elixir [45]

Answer:

Newton's third law explains the generation of thrust by a rocket engine. In a rocket engine, hot exhaust gas is produced through the combustion of a fuel with an oxidizer. The hot exhaust gas flows through the rocket nozzle and is accelerated to the rear of the rocket. In re-action, a thrusting force is produced on the engine mount.

Explanation:

pa brainliest po :D

5 0
3 years ago
A billiard ball is moving in the x-direction at 30.0 cm/s and strikes another billiard ball moving in the y-direction at 40.0 cm
PSYCHO15rus [73]

Explanation:

Given that,

Initial speed of the billiard ball 1, u = 30i cm/s

Initial speed of another billiard ball 2, u' = 40j cm/s

After the collision,

Final speed of first ball, v = 50 cm/s

Final speed of second ball, v' = 0 (as it stops)

Let us consider that both balls have same mass i.e. m

Initial kinetic energy of the system is :

K_i=\dfrac{1}{2}mu^2+\dfrac{1}{2}mu'^2\\\\K_i=\dfrac{1}{2}m(u^2+u'^2)\\\\K_i=\dfrac{1}{2}m((30)^2+(40)^2)\\\\K_i=1250m\ J

Final kinetic energy of the system is :

K_f=\dfrac{1}{2}mv^2+\dfrac{1}{2}mv'^2\\\\K_f=\dfrac{1}{2}m(v^2+v'^2)\\\\K_f=\dfrac{1}{2}m((50)^2+(0)^2)\\\\K_f=1250m\ J

The change in kinetic energy of the system is equal to the difference of final and initial kinetic energy as :

\Delta K=K_f-K_i\\\\\Delta K=1250m-1250m\\\\\Delta K=0

So, the change in kinetic energy of the system as a result of the collision is equal to 0.    

7 0
4 years ago
Other questions:
  • The field strength midway between two parallel wires carrying equal currents in the same direction will be
    14·2 answers
  • What is the region around a magnet Where the magnetic force is exerted? A period magnetic poles B tesla C charge field D magneti
    9·1 answer
  • If the internal energy of a thermodynamic system is increased by 300J while 75J of expansion work is done...?
    11·1 answer
  • Nitrogen is used to protect steel from water because nitrogen has ________.
    6·1 answer
  • A toy rocket, weighing mg=10 N, blasts straight up from a stadium of height (h) above the ground with a kinetic energy of 40 J.
    11·1 answer
  • A cubic centimeter is equal to volume in a _____?
    5·2 answers
  • How do arteries help keep you alive?
    12·2 answers
  • A group of organs that perform a body function is called a
    7·2 answers
  • a horizontal force of 25 newtons eastward causes a 10 kg box to have a displacement of 5m eastward. The total work done by the 2
    8·2 answers
  • What is the upper limit to the mass of a white dwarf? there is no upper limit. there is an upper limit, but we do not yet know w
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!