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
Ray Of Light [21]
3 years ago
10

Dielectric materials used in the manufacture of capacitors are characterized by conductivities that are small but not zero. Ther

efore, a charged capacitor slowly loses its charge by "leaking" across the dielectric. If a certain 3.25 µF capacitor leaks charge such that the potential difference decreases to half its initial value in 4 s, what is the equivalent resistance of the dielectric?
Physics
1 answer:
umka2103 [35]3 years ago
4 0

Answer:

Equivalent resistance of the dielectric= R =1.78 × 10^6 Ω

Explanation:

This is just an RC circuit, where

q = CVoe-t/RC.

V is proportional to q; so if V has lost half its value, so has q.

So we need R such that

e-t/RC = 0.5

Taking log on both sides, we get

-t/RC = ln(0.5)

R = -t/ln(0.5)C

= (-4 s)/[(3.25×10^-6 F)(-0.693147)]

= 1.78 × 10^6 Ω

You might be interested in
In one type of solar energy system, sunlight heats the air within solar panels, which heats copper tubes filled with water. What
Anna71 [15]
The type of energy that is produced by the system that is described is heat energy. The correct answer is D. 
3 0
3 years ago
Read 2 more answers
Listed following are three possible models for the long-term expansion (and possible contraction) of the universe in the absence
sineoko [7]

Answer:

From smallest ratio to the largest ratio:

Coasting Universe - Critical Universe - Recollapsing Universe(From left to right)

Explanation:

The coasting universe is one that expands at a constant rate given by the Hubble constant throughout all of cosmic time. It has a ratio of actual density to critical density that is less than 1

The critical universe is one that is at balance with no expansion .I.e. the actual density and the critical density are equal, which makes the ratio of actual density to critical density to be equal to 1

Recollapsing Universe: The expansion of the universe reverses in the future and the universe eventually recollapses. The recollapsing universe has the ratio of the actual density to the critical density to be greater than 1

7 0
3 years ago
Which activity would be the best choice foir a lifelong fitness program
Fantom [35]

I think jogging/running/walking because you don't need any equipment and you can structure around it on your own time.

7 0
3 years ago
Read 2 more answers
On the way home from school, Taylor's car runs out of gas. He has to walk 25m north and 10m west in order to reach the nearest g
spin [16.1K]

Answer:

<em>The distance is 35 m and the magnitude of the displacement is 26.93 m</em>

Explanation:

<u>Displacement  and Distance</u>

These are two related concepts. A moving object constantly travels for some distance at defined periods of time. The total distance is the sum of each individual distance the object traveled. It can be written as:

dtotal=d1+d2+d3+...+dn

This sum is calculated independently of the direction the object moves.

The displacement only takes into consideration the initial and final positions of the object. The displacement, unlike distance, is a vectorial magnitude and can even have magnitude zero if the object starts and ends the movement at the same point.

Taylor walks 25 m north and 10 m west. The total distance is the sum of both numbers:

d = 25 m + 10 m = 35 m

To calculate the displacement, we need to know the final position with respect to the initial position. If we set the coordinates of Taylor's car as the origin (0,0), then his final position is (-10,25), assuming the west direction is negative and the north direction is positive.

The magnitude of the displacement is the distance from (0,0) to (-10,25):

D=\sqrt{(25-0)^2+(-10-0)^2}

D=\sqrt{625+100}=\sqrt{725}

D = 26.93 m

The distance is 35 m and the magnitude of the displacement is 26.93 m

8 0
3 years ago
Are chemical reactions necessary in life
Salsk061 [2.6K]
Yes they are necessary 
7 0
3 years ago
Other questions:
  • A sound wave propagates through a region filled with an ideal gas at constant temperature T. It approaches an acoustically perme
    8·1 answer
  • Is this right? if not how do u do it?
    8·1 answer
  • For what values of θ are the magnitudes of the scalar product and the vector product equal? Express your answers in degrees usin
    8·1 answer
  • If the coefficient of kinetic friction between the puck and the ice is 0.05, how far does the puck slide before coming to rest?
    12·2 answers
  • What type of circuit is shown?
    15·2 answers
  • Which of the following describes plastic? HELP
    12·1 answer
  • Anyone who guesses what this means gets brainliest answer!!
    15·2 answers
  • Two people stand facing each other at a roller skating rink then push off each other. a). What is the momentum of the system bef
    10·1 answer
  • Distance vs. displacement
    13·1 answer
  • Which is better, forward bias or reverse bias, and why ?!<br>​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!