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
Klio2033 [76]
3 years ago
13

Someone please help. Describe how electric potential energy, kinetic energy, and work change when two charges of opposite sign a

re placed near each other.
Physics
1 answer:
erik [133]3 years ago
5 0

Answer:

The answer is based on the conservation of energy law; something you should really understand by now.  

For convenience we can hold one of the two charges still; it becomes the frame of reference. And everything we say is in reference to the designated static charge, call it Q.  

So the moving charge, call it q, has total energy TE = PE. It's all potential energy as we start with q not moving.  

It has potential energy because in order to separate q from Q, we had to do work, add energy, on q. And from the COE law, that work added is converted into PE.  

It's a bit like lifting something off the ground. That's work and it becomes GPE. So there's some work, in separating the two charges in the first place.  

But there's more.  

Now we let q go. As opposites attract, q is pulled to Q. And that force from Q is working on q, force over distance. Which means the potential energy q started with is being converted into kinetic energy. q is accelerating and picking up speed.  

And there's more work, done by the EMF on charge q. That converts the PE into KE and the q charge smashes into Q with some kinetic energy.

You might be interested in
Please Awnser soon water's state of matters include stream, liquid water, and ice. what about water is the same in these states?
yulyashka [42]
Well the similarity is that even though they are in a different state of matter they still come from the same substance: h2o 
7 0
3 years ago
Uses of solar cells ?
Damm [24]

Solar cells are used to trap sunlight energy (light energy) and convert it to electric energy for domestic and other purposes.

7 0
3 years ago
How much does the Earth weigh?<br><br><br><br> Have an AWESOME day<br> -NaomiTheGenuis
babymother [125]

Answer:

The Earth weighs about:
13,170,000,000,000,000,000,000,000 pounds

or

5.97 billion trillion metric tons



Explanation:

Have a great rest of your day
#TheWizzer

3 0
1 year ago
Read 2 more answers
Ms. Kasper is in a panic. Her cat, Penny, is stuck in a tree and about to jump out. In order to save her cat, Ms. Kasper needs t
Misha Larkins [42]

Answer:

Speed greater than 4 m/s

Explanation:

Given that Ms. Kasper is in a panic. Her cat, Penny, is stuck in a tree and about to jump out. In order to save her cat, Ms. Kasper needs to run to the tree, 12 meters away. If it takes her cat, 3 seconds to fall, how fast would Ms. Kasper have to run to save her cat?

The distance = 12 m

Time = 3s

Speed = distance/time

Speed = 12/3

Speed = 4 m/s

Ms Kasper must run at speed more than 4m/s for her to save the cat.

3 0
3 years ago
A student makes a short electromagnet by winding 300 turns of wire around a wooden cylinder of diameter d 5.0 cm. The coil is co
kupik [55]

Answer:

A) μ = A.m²

B) z = 0.46m

Explanation:

A) Magnetic dipole moment of a coil is given by; μ = NIA

Where;

N is number of turns of coil

I is current in wire

A is area

We are given

N = 300 turns; I = 4A ; d =5cm = 0.05m

Area = πd²/4 = π(0.05)²/4 = 0.001963

So,

μ = 300 x 4 x 0.001963 = 2.36 A.m².

B) The magnetic field at a distance z along the coils perpendicular central axis is parallel to the axis and is given by;

B = (μ_o•μ)/(2π•z³)

Let's make z the subject ;

z = [(μ_o•μ)/(2π•B)] ^(⅓)

Where u_o is vacuum permiability with a value of 4π x 10^(-7) H

Also, B = 5 mT = 5 x 10^(-6) T

Thus,

z = [ (4π x 10^(-7)•2.36)/(2π•5 x 10^(-6))]^(⅓)

Solving this gives; z = 0.46m =

3 0
3 years ago
Other questions:
  • If it takes Ashley 3 seconds to run from the batters box to first base at an average speed of 6.5 meters per second, what is the
    11·2 answers
  • What is the sequence of energy transformations associated with a hydroelectric dam?
    13·2 answers
  • The position of a particle is given by the function x=(5t3−8t2+12)m, where t is in s. at what time does the particle reach its m
    12·2 answers
  • What is terminal speed? When a skydiver has reached terminal speed, what is the are resistance equal to? What is the skydiver’s
    6·2 answers
  • A device that has the capacity to receive and store electrical energy is a(n)
    8·2 answers
  • What are the similarities and differences between light and sound waves?
    15·2 answers
  • What type of force pulls in two opposite directions?
    8·2 answers
  • What best accounts for the periodic trends seen in ionization energy?
    6·1 answer
  • To calculate the change in kinetic energy, you must know the force as a function of _______. The work done by the force causes t
    11·1 answer
  • If you wanna make it easier you can number them going down 1,2,3, or 4 &amp; just tell me the number
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!