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drek231 [11]
3 years ago
6

Classify each of the following items as a rigid body, a system of rigid bodies, or a nonrigid body:

Physics
1 answer:
KatRina [158]3 years ago
5 0

Answer:

<u>Rigid bodies:</u> Options d and e

<u>Rigid bodies' system:</u> options f, g and h

<u>Non-rigid bodies:</u> Options a, b and c

Explanation:

The above classification of the mentioned objects into rigid bodies, non rigid bodies and system of rigid bodies can be explained as :

Rigid body: A body which does not undergo any change in its form or shape on application of externally applied load or force is said to be a rigid body.

System of Rigid bodies:

A system of rigid bodies is different from any other element system as in this the bodies constituting the system must be rigid bodies.

Non-rigid bodies:

A body which undergoes a change in its form or shape on application of externally applied force or load is said to be a non-rigid body.

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What is the drawback to using superconductors?
Fittoniya [83]

Answer:

Option A

The cost of keeping the semiconductor below the critical temperature is unreasonable

Explanation:

First of all, we need to understand what superconductors are. Superconductors are special materials that conduct electrical current with almost zero resistance. This means that there is little or no need for a voltage source to be connected to them. As a matter of fact, once a superconductor is connected to a power supply, one can remove the power supply and the current will still flow.

However, most superconducts can only conduct at very low temperatures up to -200 degrees Celcius. This is because, at that temperature, their atoms and molecules are relatively settled, hence they pose little or no resistance to the flow of current.

This as you can guess is extremely difficult to do, as you will need a lot of effort to cool it to that temperature and maintain it.

This makes option a the answer:

The cost of keeping the semiconductor below the critical temperature is unreasonable.

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2 years ago
If the magnetic field strength is found to be zero between the two wires at a distance of 3.0 cm from the first wire, what is th
Taya2010 [7]

Answer: The magnitude of the current in the second wire 2.67A

Explanation:

Here is the complete question:

Two straight parallel wires are separated by 7.0 cm. There is a 2.0-A current flowing in the first wire. If the magnetic field strength is found to be zero between the two wires at a distance of 3.0 cm from the first wire, what is the magnitude of the current in the second wire?

Explanation: Please see the attachments below

4 0
3 years ago
A current of 0.4 A flows through a wire. How many electrons flow through a cross section of
Free_Kalibri [48]

9 × 10²¹ electrons flow through a cross section of the wire in one hour.

<h3>What is the relation between current and charge?</h3>
  • Mathematically, current = charge / time
  • In S.I. unit, Charge is written in Coulomb and time in second.

<h3>What is the amount of charge flown through a wire for one hour if it carries 0.4 A current?</h3>
  • Charge= current × time
  • Current= 0.4 A, time = 1 hour= 3600 s
  • Charge= 0.4× 3600

= 1440 C

<h3>How many numbers of electrons present in 1440C of charge?</h3>
  • One electron= 1.6 × 10^(-19) C
  • So, 1440 C = 1440/1.6 × 10^(-19)

= 9 × 10²¹ electrons

Thus, we can conclude that the 9 × 10²¹ electrons flow through a cross section of the wire in one hour.

Learn more about current here:

brainly.com/question/25922783

#SPJ1

4 0
2 years ago
A scientist studies how sunlight affects a person's skin. Which statement is a
zhannawk [14.2K]

Answer:

If you spend more time in the sun, your skin will become drier.

a p e x

3 0
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2. Name two specific contributions Bohr made to our understanding of atomic
pickupchik [31]

Answer:

Bohr's greatest contribution to modern physics was the atomic model. ... Bohr was the first to discover that electrons travel in separate orbits around the nucleus and that the number of electrons in the outer orbit determines the properties of an element

Explanation:

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