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kicyunya [14]
3 years ago
15

An insulating plastic rod is charged by rubbing it with a wool cloth, and then brought to an initially neutral conducting metall

ic sphere sitting on an insulating stand. The rod touches the sphere for a few seconds, and then is separated from the sphere by a small distance. After the rod is separated, the rod:_____
A) is repelled by the sphere.
B) is attracted to the sphere.
C) feels no force due to the sphere.
Physics
1 answer:
barxatty [35]3 years ago
3 0

Answer:

A) is repelled by the sphere.

Explanation:

When a charged insulated rod is touched with an insulated conducting sphere , some  charge on the rod gets transferred to the sphere . So they become similarly charged . We all know that there is repulsion when two similarly charged object are brought near to each other . Hence here too there will be repulsion between the rod and the sphere when the rod is brought near the sphere.

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When a potassium atom forms an ion, it loses one electron. What is the electrical charge of the potassium ion?
fomenos
The correct answer is answer choice C. +1. Since electrons have negative charges, losing one electron will cause the atom to have a positive charge of 1. This charge comes from the protons, which, until one electron was lost, balanced out the negative charge of the electrons and caused the atom to be neutral.
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Being able to see a square in the middle of the image despite not having lines to form a square represents the Gestalt principle
vredina [299]

Answer: The correct answer for the blank is -

C. closure.

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This is due the fact that our brain responds to the familiar patterns inspite of getting incomplete information.

For instance, in the given question, we are able to perceive an image of square in the center despite not having actual lines that form a square.

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7 0
3 years ago
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An object has a kinetic energy of 175 J and a momentum of magnitude 25.0 kg m/s. Find the
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Answer:14 m/s

Explanation:

Kinetic energy(ke)=175J

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Speed=v

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Ke=(m x v x v)/2

175=(mv^2)/2

Cross multiply

175 x 2=mv^2

350=mv^2

Momentum=mass x velocity

25=mv

m=25/v

Substitute m=25/v in 350=mv^2

350=25/v x v^2

350=25v^2/v

v^2/v=v

350=25v

v=350/25

v=14 m/s

5 0
3 years ago
Refrigerant-134a enters an adiabatic compressor as saturated vapor at -24C and leaves at 0.8 MPa and 60C. When the mass flow r
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Answer:

= 287kW

Explanation:

Knowing the enthalpy data, we have to

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So,

E_i_n_p_u_t=mh_1

Here,

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Replacing

= 1.2 × 239.16

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4 0
2 years ago
A permanent magnet picks up an iron nail, magnetizing the nail. How is this system different from an electromagnet?
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D

Its D i think because it doesnt refer to any other things

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2 years ago
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