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tino4ka555 [31]
3 years ago
8

Please give me 7th grade science fair ideas?

Physics
1 answer:
Tems11 [23]3 years ago
7 0
1) the electromagnetic spectrum and light 2) how the eye works and what the brain has to do with it 3) how nuclear anf atomic structures work
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Explain the phenomenon of polarization when a dielectric slab is subjected to an electric<br> field?
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A dielectric, insulating material, or an extremely bad conductor of electrical current. Due to the absence of loosely bound, or free, electrons that could wander through the material, unlike metals, dielectrics practically do not conduct current when exposed to an electric field. Electric polarization takes place instead.

<h3>What is an Electric field?</h3>
  • An electric field is an electrical property associated with every point in the space of any form of charge. An electric field is also described as the electric force per unit charge.
  • Variable magnetic fields or electric charges are frequently the cause of electric fields. Volts per meter, a unit used in the SI, express electric field strength.
  • The force acting on the positive charge is assumed to be exerted in the direction of the field. The electric field is directed radially inwards toward the negative point charge and radially outwards from the positive charge.
  • Electric charge or magnetic fields with variable amplitudes can produce an electric field. The attraction forces that keep together atomic nuclei and electrons at the atomic scale are brought on by the electric field.

The phenomenon of polarization when a dielectric slab is subjected to an electric field:

A dielectric, insulating material, or an extremely bad conductor of electrical current. Due to the absence of loosely bound, or free, electrons that could wander through the material, unlike metals, dielectrics practically do not conduct current when exposed to an electric field. Electric polarization takes place instead.

To learn more about the electric field, refer to:

brainly.com/question/14372859

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2 years ago
A car is traveling 100 km/hr. How many hours will it take to cover a distance of 850 km?
Evgesh-ka [11]

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8.5 hours

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Look at the diagram below. What is the size of the overall force on the boat?
inysia [295]
Can i get a picture pls
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You look at a barometer and see that the air pressure is getting much higher... How will the weather probably change? *
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The weather will clear up and get sunnier.

Explanation:As weather forecasters monitor air pressure, falling barometer measurements can signal that bad weather is on the way. In general, if a low pressure system is on its way, be prepared for warmer weather with storms and rain. If a high pressure system is coming, you can expect clear skies and cooler temperatures.

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When a 109 dB sound wave comes through an open window of area 0.485 m2, how much acoustic energy passes through the window in a
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