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
iren [92.7K]
3 years ago
13

. A cathode ray tube (CRT) is a device that produces a focused beam of electrons in a vacuum. The electrons strike a phosphor-co

ated glass screen at the end of the tube, which produces a bright spot of light. The position of the bright spot of light on the screen can be adjusted by deflecting the electrons with electrical fields, magnetic fields, or both. Although the CRT tube was once commonly found in televisions, computer displays, and oscilloscopes, newer appliances use a liquid crystal display (LCD) or plasma screen. You still may come across a CRT in your study of science. Consider a CRT with an electron beam average current of 25.00μA25.00μA . How many electrons strike the screen every minute?
Physics
1 answer:
charle [14.2K]3 years ago
8 0

Answer:

The value is n=  9.375 *10^{15} \  electrons

Explanation:

From the question we are told that

  The average current is  I  =  25.0 \mu A = 25.0 *10^{-6} \  A

Generally the quantity of charge (electron )  is mathematically represented as

       Q =  ne

Here e is the charge on a single electron with value e = 1.60  *10^{-19} \  C

   Generally current is mathematically represented as

     I  = \frac{Q}{t}

=>   I  = \frac{ne}{t}

Here t is time which is given as 1 minutes =  60  seconds

  and  n is the number of electrons

So

      25.0 *10^{-6}  = \frac{ n* 1.60  *10^{-19}}{60}

=>    60  * 25.0 *10^{-6} =  n* 1.60  *10^{-19}

=>    n=  \frac{60  * 25.0 *10^{-6} }{ 1.60  *10^{-19} }

=>    n=  9.375 *10^{15} \  electrons

You might be interested in
I NEED THIS ASAP!!<br> Which formula defines the unit for electrical power?
pantera1 [17]
C option
Power = voltage x current
6 0
3 years ago
Read 2 more answers
Which resource would be the best choice to learn more information about studying martial arts?
zhuklara [117]

Answer:

Dance studio

Explanation:

Martial art use to defend ourself from any dangerous. Dance is a way to learn it

3 0
3 years ago
An electrician wraps rubber electrical tape around a copper wire. Since rubber is an insulator, which statement best explains th
yuradex [85]

A) Rubber stops charges from flowing. This protects people by stopping electricity from flowing.

Explanation:

The statement that best describes the point of wrapping rubber around the copper wire is that the rubber stops charges from flowing. This prevents people from getting electrical shocks by stopping the flow  of electricity.

  • A rubber is an insulator.
  • Insulators are substances that prevents the flow of electricity.
  • The lack free mobile electrons or ions that makes them conductors.
  • When they are wrapped round a conductor such as copper wire, they will halt the flow of charges.
  • Copper is a conductor of both heat and electricity. It has free mobile electrons.

learn more:

Metals brainly.com/question/2474874

#learnwithBrainly

4 0
3 years ago
Why do temperatures on the moons surface vary ncyb more than temperatures on earth
ollegr [7]

Answer:

The moon has no atmosphere

Explanation:

The temperatures on the surface of the Moon vary much more than those on Earth because the moon has no atmosphere (third answer in the list), and therefore there are no molecules that could retain residual heat and make the change from day to night a softer transition.

5 0
3 years ago
Identify the labeled parts in the figure.
Hitman42 [59]

Answer:

I. a, c, f and h

II. e

III. b, d, g and i

IV. i

Explanation:

I. Chemical symbols are simple abbreviations used to represent various elements or compound. They consist entire of alphabet.

For the diagram given above, the labelled parts which represent chemical symbol are: a, c, f and h

II. Coefficients are numbers written before the chemical symbol of elements or compound.

For the diagram given above, the labelled part which represent Coefficient is: e

III. Number of atoms of element present in a compound is simply obtained by taking note of the numbers written as subscript in the chemical formula of the compound.

For the diagram given above, the labelled part which represent the number of atoms of the element are: b, d, g and i

IV. When no number is written as subscript in the formula of the element in the compound, it means the element has just 1 atom in the compound.

For the diagram given above, the labelled part which indicates that only 1 atom of the element is present is: i

5 0
3 years ago
Other questions:
  • A constant force of 40N acting on a body initially at rest gives it an acceleration of 0.1m/s inverse 2 for 4s .calculate the wo
    13·1 answer
  • If your brakes fail, look for something to rub against, try to pick something that will not give way.True or False?
    5·1 answer
  • If the specific heat of water is 1.0 calorie/gram°C, how many calories are required to raise 500 grams of water 10.0°C?
    6·1 answer
  • When you push something what is that force called
    8·1 answer
  • The source of heat for a (an) _____ system is electricity
    7·1 answer
  • An optical engineer wishes to specify the properties of a concave makeup mirror, which is supposed to provide an upright and enl
    12·1 answer
  • Which example does not describe a behavioral adaptation? A. A squirrel buries acorns to dig up and eat later. B. A honeybee does
    13·2 answers
  • Define , gravitational acceleration
    15·1 answer
  • 33. What steps can you take to minimize your risks from air pollution?
    14·1 answer
  • A shopper is pushing a cart down a grocery store aisle. Starting from rest, the shopper applies a constant force to the cart for
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!