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ozzi
4 years ago
13

a body at rest in one reference frame may be in motion in another reference frame what does it mean?​

Physics
1 answer:
vovikov84 [41]4 years ago
4 0

Answer:

Explanation:

Suppose you are standing on a platform connected to a train station. You appear to be at rest to a third person looking at you from the parking lot.

But what happens if you are observed by someone in the dining car of the train that just passed you?

You appear to be moving. He can prove it because your relative size is getting smaller. How does he know that it is he that is moving and that you are standing still? If he has no idea what's going on with his motion, he also has no idea who is moving.

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Name two appliance that use electromagnet.
Bess [88]

Answer:

Electromagnets are very widely used in electric and electromechanical devices, including:

Motors and generators.

Transformers.

Relays.

Electric bells and buzzers.

Loudspeakers and headphones.

Actuators such as valves.

Magnetic recording and data storage equipment: tape recorders, VCRs, hard disks.

6 0
3 years ago
Read 2 more answers
One-half mole of propane combines with 2.5 moles of oxygen to produce_____moles of water and_____moles of carbon dioxide.
Virty [35]

The balanced equation of the combustion of the propane is

C_3H_8+5O_2\rightarrow3CO_2+4H_2O

From the above chemical equation, it is clear that 1 mole of propane requires 5 moles of oxygen to undergo complete combustion as the result of this reaction, 3 moles of carbon-di-oxide and 4 moles of water molecules will be produced.

Therefore one-half mole of propane requires 2.5 moles of oxygen to undergo complete combustion. And in the reaction, 1.5 moles of carbon-di-oxide and 2 moles of water molecules are produced.

Therefore the answer is, 'One-half of propane combines with 2.5 moles of oxygen to produce 2 moles of water and 1.5 moles of carbon dioxide'

7 0
1 year ago
To overcome an object's inertia, it must be acted upon by __________.
Nastasia [14]

Correct answer choice is :


C) Force


Explanation:


In physics, a force is any cooperation that, when unrestricted, will vary the motion of an object. A force can create an object with mass to alter its velocity to accelerate. Force can also be defined intuitively as a push or a pull. A force acting on an object may create the object to alter shape, to start moving, to stop moving, to stimulate or decelerate. When two objects communicate with each other they exert a force on each other, the forces are just in size but different in direction.

6 0
4 years ago
Read 2 more answers
What 2 key vocabulary words are used when you send an object in motion?
ad-work [718]

Answer:

push or pull

Explanation:

7 0
3 years ago
Read 2 more answers
Which is not a property of displacement?
Veronika [31]
The answer is B: it is a scalar measurement
3 0
3 years ago
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