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Crank
4 years ago
5

Point charge A is located at point A and point charge B is at point B. Points A and B are separated by a distance r. To determin

e the electric potential at the mid-point along a line between points A and B, which of the following mathematical approaches is correct? a. The difference in the absolute value (the sign of the charges does not enter into the calculation) of the two electric potentials is determined at a distance r/2 from each of the charges. b. The algebraic sum of the two electric potentials is determined at a distance r/2 from each of the charges, making sure to include the signs of the charges. c. The electric potential due to each charge is determined at a distance r/2 from each of the charges and an average is taken of the two values. d. The vector sum of the two electric potentials determines the total electric potential at a distance r/2 from each of the charges
Physics
1 answer:
fredd [130]4 years ago
3 0

Answer:

B. The algebraic sum of the two electric potentials is determined at a distance r/2 from each of the charges, making sure to include the signs of the charges.

Explanation:

Total electric potential is the sum of all the electric potential. And because electric potential is a scalar quantity you have to account for the signs.

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There is a girl pushing on a large stone sphere. The sphere has a mass of 8200 kgand a radius of 90 cm and floats with nearly ze
svetlana [45]

Answer:

35.1688 seconds

Explanation:

M = Mass of sphere = 8200 kg

R = Radius of sphere = 90 cm

F = Force = 30 N

Moment of inertia is given by

I=\dfrac{2}{5}MR^2\\\Rightarrow I=\dfrac{2}{5}\times 8200\times 0.9^2\\\Rightarrow I=2656.8\ kgm^2

Torque is given by

\tau=I\alpha\\\Rightarrow FR=I\alpha\\\Rightarrow \alpha=\dfrac{FR}{I}\\\Rightarrow \alpha=\dfrac{30\times 0.9}{2656.8}\\\Rightarrow \alpha=0.01016\ rad/s^2

For one rotation

\theta=\omega_it+\dfrac{1}{2}\alpha t^2\\\Rightarrow 2\pi=0\times t+\dfrac{1}{2}\times 0.01016\times t^2\\\Rightarrow t=\sqrt{\dfrac{2\pi2}{0.01016}}\\\Rightarrow t=35.1688\ s

The time taken to rotate the sphere from rest is 35.1688 seconds

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3 years ago
What type of energy is related to the temperature change?
Viktor [21]
I think it would be thermal energy 
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4 years ago
A 58-kg boy swings a baseball bat, which causes a 0.140-kg baseball to move towards 3rd base with a velocity of 38.0 m/s. What i
Anestetic [448]

ANSWER:

101.08 joules.

STEP-BY-STEP EXPLANATION:

Given:

m = 0.140 kg

v = 38.0 m/s

Kinetic energy can be calculated using the following formula:

E=\frac{1}{2}\cdot m\cdot v^2

Replacing

\begin{gathered} E=\frac{1}{2}\cdot0.140\cdot(38.0)^2 \\ E=101.08\text{ J} \end{gathered}

The kinetic energy of baseball is 101.08 joules.

4 0
2 years ago
Three boxes rest side-by-side on a smooth, horizontal floor. Their masses are 5.0 kg, 3.0 kg, and 2.0 kg, with the 3.0-kg mass i
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Answer:25 N

Explanation:

Given

mass of 5 , 3 & 2 kg blocks lie on floor

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where a is the acceleration of the system

N_2=reaction on 3 kg block by 5 kg block

N_2-N_1=3a

N_2=5a

Now for 5 kg block

F-N_2=5a

F=10a

a=\frac{F}{10}=5 m/s^2

Force exerted by 5 kg block on 3 kg block is

N_2=5\times 5=25 N

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3 years ago
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