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
Alona [7]
3 years ago
7

A 0.75μF capacitor is charged to 70 V . It is then connected in series with a 55Ω resistor and a 140 Ω resistor and allowed to d

ischarge completely. Part A How much energy is dissipated by the 55Ω resistor?
Physics
1 answer:
Ipatiy [6.2K]3 years ago
6 0

Answer:

Explanation:

Capacitor of 0.75μF, charged to 70V and connect in series with 55Ω and 140 Ω to discharge.

Energy dissipates in 55Ω resistor is given by V²/R

Since the 55ohms and 140ohms l discharge the capacitor fully, the voltage will be zero volts and this voltage will be shared by the resistor in ratio.

So for 55ohms, using voltage divider rule

V=R1/(R1+R2) ×Vt

V=55/(55+140) ×70

V=19.74Volts is across the 55ohms resistor.

Then, energy loss will be

E=V²/R

E=19.74²/55

E=7.09J

7.09J of heat is dissipated by the 55ohms resistor

You might be interested in
Jeff is part of a trekking team. As he climbs a hill, he drops his water bottle, which has a mass of 0.25 kilograms. The bottle
eduard
Hope this helps you.

6 0
3 years ago
Read 2 more answers
Where is the switch located on this diagram?
Fed [463]
For this case, the switch is located at point B of the diagram.
 Remember that point D is the universal symbol for resistance.
 In A what you have is a source of power and in C what you have is a cable.
 Therefore, the answer for this case is B.
6 0
2 years ago
Chemical substances in food that have specific functions in your body are called?
andreev551 [17]

Answer:

Chemical substances in food that have specific functions in your body are called Nutrients. Examples: proteins, fats, carbohydrates, vitamins, and minerals

Explanation:

These chemical substances keep our body healthy.

These chemical substances prevent the premature aging.

They help our body to fight against diseases.

They build the new tissues and cells for growth.

And in short, they help in the growth, development of our body.

4 0
3 years ago
Which of the following is the best definition of vectors
Allisa [31]

A vector would be a quantity that has both magnitude and direction.

3 0
3 years ago
A Ferris wheel on a California pier is 27 m high and rotates once every 32 seconds in the counterclockwise direction. When the w
Leto [7]

A) 140 degrees

First of all, we need to find the angular velocity of the Ferris wheel. We know that its period is

T = 32 s

So the angular velocity is

\omega=\frac{2\pi}{T}=\frac{2\pi}{32 s}=0.20 rad/s

Assuming the wheel is moving at constant angular velocity, we can now calculate the angular displacement with respect to the initial position:

\theta= \omega t

and substituting t = 75 seconds, we find

\theta= (0.20 rad/s)(75 s)=15 rad

In degrees, it is

15 rad: x = 2\pi rad : 360^{\circ}\\
x=\frac{(15 rad)(360^{\circ})}{2\pi}=860^{\circ} = 140^{\circ}

So, the new position is 140 degrees from the initial position at the top.

B) 2.7 m/s

The tangential speed, v, of a point at the egde of the wheel is given by

v=\omega r

where we have

\omega=0.20 rad/s

r = d/2 = (27 m)/2=13.5 m is the radius of the wheel

Substituting into the equation, we find

v=(0.20 rad/s)(13.5 m)=2.7 m/s

6 0
3 years ago
Other questions:
  • Describe the motion of the object in Graph B of figure 11-2.
    15·2 answers
  • A 24 V battery is connected in series to a resistor of 4 Ω, a resistor of 12 Ω and a resistor of 15 Ω. What is the current in th
    9·1 answer
  • Does anyone know how to do this? i tried doing some but i don't think i did them right.
    13·1 answer
  • Does visible light make up a relatively large part or a relatively small part of the electromagnetic spectrum?
    7·1 answer
  • During a hot shower, water vapor fogs up the cooler mirror when it turns to water. This is an example of ____. A) condensation b
    8·2 answers
  • A ball is thrown horizontally from a 20-m-high building with a speed of 5.0m/s
    11·1 answer
  • The endocrine system consists of: (2 points)
    11·1 answer
  • WHAT IS THE SPEED OF LIGHT?
    14·1 answer
  • PLEEEEASE HELP ME PLEASE WILL GIVE BRAINLIEST
    8·1 answer
  • A heavy box with a square base and a height twice the length of a side is to be transported by a lorry. Explain how the stabilit
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!