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Effectus [21]
3 years ago
14

Which force below acts at 90 degrees and is applied by a surface/wall to an object.

Physics
1 answer:
Molodets [167]3 years ago
4 0

Answer:

B. normal

please mark as brainliest

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2. A rod 14.0 cm long is uniformly charged and has a total charge of -22.0 μC. Determine the magnitude and direction of the net
Sloan [31]

Explanation:

It is given that,

Length of rod, l = 14 cm = 0.14 m

Total charge, Q=-22\ \mu C=-22\times 10^{-6}\ C

We need to find the magnitude and direction of the net electric field produced by the charged rod at a point 36.0 cm to the right of its center along the axis of the rod, z = 36 cm = 0.36 m

Electric field at the axis of rod is given by :

E=\dfrac{\lambda}{2\pi \epsilon_o z}

Where

\lambda is the linear charge density, \lambda=\dfrac{Q}{l}

So, E=\dfrac{Q}{2\pi \epsilon_o zl}

E=\dfrac{-22\times 10^{-6}}{2\pi \times 8.85\times 10^{-12}\times 0.36\times 0.14}

E = −7849988.22 N/C

or

E=-7.84\times 10^6\ N/C

Negative sign shows the direction of electric field is inward in all direction. Hence, this is the required solution.

7 0
4 years ago
How does an insulator stop the flow of an electric current? Question 2 options: insulator keeps the electrons in the insulator f
pickupchik [31]
Electrons in an insulator do not move readily. This is because insulators are objects whose internal electric charges do not flow freely. They impede the flow of electrons from one atom to another atom, thus restricting the flow of electricity. Insulators are electrically inactive and the are used to stop the flow of electric current.
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3 years ago
Suppose you have a car with a battery that applies 12.5 V to the starter.
Marat540 [252]

Answer:

R = 0.1 ohms

Explanation:

It is given that,

Voltage of the battery, V = 12.5 V

Current flowing in the car's starter, I = 125 A

We need to find the effective resistance of a car's starter. It can be calculated using Ohm's law. Let R is the resistance.

V=IR\\\\R=\dfrac{V}{I}\\\\R=\dfrac{12.5}{125}\\\\R=0.1\ \Omega

So, the resistance of the car's starter is 0.1 ohms.

7 0
3 years ago
25 Pts. - URGENT
Alex_Xolod [135]

Answer:

I'm pretty sure that it's -225, hope this helps

3 0
3 years ago
How are different types of radiation arranged along the electromagnetic spectrum
Leona [35]
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3 years ago
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