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3 years ago

NEED HELP!!! IF YOU ANSWER ALL QUESTIONS I WILL GIVE YOU BRAINEST!!!!! 15 POINTS!!!!

Physics

2 answers:

SVETLANKA909090 [29]3 years ago

8 0

Answer: A, D, A

Explanation:

marissa [1.9K]3 years ago

8 0

Answer:

1. D

2. A

3. A

Explanation:

This is what i think. If it is not right, I am sorry. Hopefully, this will help you!

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4 years ago

Two identical conducting small spheres are placed with their centers 0.290 m apart. One is given a charge of 12.0 nC and the oth

Solnce55 [7]

Answer:

Force between two identical conducting ball will be $2.65\times 10^{-5}N$

Explanation:

We have given there is two identical conducting small spheres having charge $q_1=12nC=12\times 10^{-9}C$ and $q_2=-21nC=-21\times 10^{-9}C$

Distance between centers of the ball is 0.290 m

So r = 0.290 m

We have to fond the electric force between the balls

According to Coulomb's law force between two charges is given by

$F=\frac{1}{4\pi \epsilon _0}\frac{q_1_2}{r^2}=\frac{Kq_1q_2}{r^2}$

So force $F=\frac{9\times 10^{9}\times 12\times 10^{-9}\times 21\times 10^{-9}}{0.293^2}=2.65\times 10^{-5}N$

So force between two identical conducting ball will be $2.65\times 10^{-5}N$

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3 years ago

Light-rail passenger trains that provide transportation within and between cities speed up and slow down with a nearly constant

Elena L [17]

Answer:

19 m/s

Explanation:

The complete question requires the final speed to be calculated.

Velocity is the rate and direction at which an object moves. Acceleration is the rate of change of velocity per unit time and can be calculated by the difference in velocity over a given time.

For this question, first the unknown acceleration must be calculated and used to determine the final velocity

Step 1: Calculate the acceleration

$a=\frac{v_{2}-v{1}}{t_{1}}$

$a=\frac{11-7}{8}$

$a=\frac{4}{8}$

$a=0.5 m/s^{2}$

Step 2: Calculate the velocity using the acceleration calculated above

$a=\frac{v_{3}-v{2}}{t_{2}}$

$0.5=\frac{v_{3}-11}{16}$

$v_{3}=19 m/s$

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