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statuscvo [17]
3 years ago
8

Two point charges, one ​q and the other – q, form a dipole separated by a distance d. A third charge Q is placed midway between

these two charges. If the distance between q and – q is then doubled with the Q staying midway between the other two, what happens to the force on Q?
Physics
1 answer:
Maksim231197 [3]3 years ago
4 0

Answer:

it will reduce by 4

Explanation:

From Coulomb's law,

Force is inversely proportional to distance of separation between the centre of the two charges.

when d is doubled, the force between q and -q will reduce by a factor of 4 same also applies to the force on Q and any of q or -q

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A 125kg bumper car going 12m/s hits a 235kg bumper car going -13m/s.if the first car bounces back at -12.5m/s what is the veloci
vovikov84 [41]
According to the law of conservation of momentum:

m_{1}v_{1}+m_{2}v_{2}=m_{1}v_{1}'+m_{2}v_{2}'

m1 = mass of first object
m2 = mass of second object
v1 = Velocity of the first object before the collision
v2 = Velocity of the second object before the collision
v'1 = Velocity of the first object after the collision
v'2 = Velocity of the second object after the collision

Now how do you solve for the velocity of the second car after the collision? First thing you do is get your given and fill in what you know in the equation and solve for what you do not know. 

m1 = 125 kg     v1 = 12m/s      v'1 = -12.5m/s
m2 = 235kg      v2 = -13m/s     v'2 = ?

m_{1}v_{1}+m_{2}v_{2}=m_{1}v_{1}'+m_{2}v_{2}'
(125kg)(12m/s)+(235kg)(-13m/s)=(125kg)(-12.5m/s)+(235kg)(v_{2}'
1,500kg.m/s+(-3055kg.m/s)=(-1562.5kg.m/s)+(235kg)(v_{2}')
-1,555kg.m/s=(-1562.5kg.m/s)+(235kg)(v_{2}')

Transpose everything on the side of the unknown to isolate the unknown. Do not forget to do the opposite operation. 

-1,555kg.m/s + 1562.5kg.m/s=(235kg)(v_{2}')
7.5kg.m/s=(235kg)(v_{2}')
(7.5kg.m/s)/(235kg)=(v_{2}')
0.03m/s=(v_{2}')

The velocity of the 2nd car after the collision is 0.03m/s.
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Blababa [14]

Answer:

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Hope this helps, have a nice day! (^-^)

6 0
3 years ago
Read 2 more answers
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Evgen [1.6K]

Answer:

Explanation:

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Andreyy89

Answer:

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In the question it says one element replaces another element which means there is only one replacement.

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