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
Gnesinka [82]
3 years ago
15

A point charge q1 is held stationary at the origin. A second charge q2 is placed at point a, and the electric potential energy o

f the pair of charges is 5.4 x 10^-8J. When the second charge is moved to point b, the electric force on the charge does -1.9x10^-8J of work. What is the electric potential energy of the pair of charges when the second charge is at point b?
Physics
1 answer:
MAVERICK [17]3 years ago
7 0

Answer:

U_{b}=+7.3*10^{-8}J

Explanation:

When a particle moves from a point where the potential energy is Ua to point where it is Ub,the change in potential energy is is equal to work done

So

W_{a-b}=U_{a}-U_{b}\\ U_{b}=U_{a}-W_{a-b}\\

Where Wa-b here is negative this means Ub is greater Ua. Therefore potential energy increases

So

U_{b}=(+5.4*10^{-8}J )-(-1.9*10^{-8}J)\\U_{b}=+7.3*10^{-8}J  

You might be interested in
An object with charge q=−6.00×10−9C is placed in a region of uniform electric field and is released from rest at point A. After
shtirl [24]

Answer:

its a

Explanation:

used google

8 0
3 years ago
What do we mean when we say that 50 million tons of coal could replace the use of 0.6 MBPD (million barrels per day) of oil used
ololo11 [35]
<span>This statement simply implies that the 50 million tons of coal will produce the same energy output in one year as the 0.6 million barrels per day of oil. Assuming coal is more plentiful than oil, this is significant as 50 million tons is much smaller than 219 million barrels of oil.</span>
6 0
3 years ago
Trumpeter A holds a B-flat note on the trumpet for a long time. Person C is running towards the trumpeter at a constant velocity
Vikki [24]
You didn't mention it, but the trumpeter herself has to be standing still.

<span>Person C, the one running towards the trumpeter, hears a pitch
that is higher than B-flat.  (A)

Person B, the one running away from the trumpeter, hears a pitch
that is lower than B-flat.

Person D, the one standing still the whole time, hears the B-flat.</span>
5 0
3 years ago
Read 2 more answers
Which explanation is based on scientific evidence?​
Yuki888 [10]

Answer:

Scientific evidence is evidence that serves to either support or counter a scientific theory or hypothesis. Such evidence is expected to be empirical evidence and interpretable in accordance with scientific method.

5 0
3 years ago
What are 3 adjectives that describe a super bowl crowd
Aleks04 [339]
Loud
Crazed
Herd-like
Irrational
Deafening
Primitive
Possessed
Tribal
5 0
3 years ago
Other questions:
  • Three 10-cm-long rods form an equilateral triangle. Two of the rods are charged to + 19 nC, the third to - 19 nC.What is the ele
    14·1 answer
  • A beam of light shining from water to air strikes the surface at an angle greater than 48° and produces total internal reflectio
    15·1 answer
  • A good way to de-magnetize something is to
    11·2 answers
  • The expanding gases that leave the muzzle of a rifle also contribute to the recoil. A .30 caliber bullet has mass 7.20×10−3 kg a
    8·1 answer
  • A motorcycle rider travelling at 30m/s sees a child run into the streets 190m ahead. If the rider takes 1 second to react before
    5·1 answer
  • A glacier is eroding the land over which it passes. It moves at a rate of 2 m per day. Currently, the glacier is 80 km from a sm
    11·1 answer
  • A 7 kilogram cat is resting on top of a bookshelf that is 3 meters high. What is the cat’s gravitational potential energy relati
    5·1 answer
  • Which object has the most Kinetic Energy?
    11·2 answers
  • Is it First or Second law Newtons law? Fill in the blanks
    12·2 answers
  • Can a physical guantity have unit but is dimensionless ?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!