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astra-53 [7]
3 years ago
11

______ states that energy cannot be created or destroyed.

Physics
2 answers:
Alex3 years ago
7 0

Answer:

c. The law of conservation of energy

Explanation:

The famous "law of conservation of Energy" states that energy inside an isolated system remains conserved. It can not be created and can't be destroyed as well. The energy can only be moved or transformed into another form.

This can be proved using "Noether's Theorem". Classically, only energy was considered conserved but Special Relativity proved that even mass is conserved as it showed the relation between mass and energy.

Pavel [41]3 years ago
4 0
The answer is a newton second law
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What is the time required for sound to travel 1.75 km if the temp of the air is 20 C°?
murzikaleks [220]

Answer:

Explanation:

The 2 equations we need for this are

v=331.5+.606T and

d = rt. First we need to find the velocity using the first equation, then we will plug it into the distance equation as the rate to find the time.

v = 331.5 + .606(20.0) I used 3 sig figs for the temp instead of the 1 found in 20.

v = 331.5 + 12.1 so

v = 343.6 m/s

Now, before we can find the time in seconds, we need to convert the distance to meters.

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7 0
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5 0
3 years ago
Is it 100% sur than electron have negative charg and proton have pasitive????
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4 0
4 years ago
a mass of 0.400 is raised by a vertical distance of 0.450m in the earths growth gravitational field. what is the change in its g
swat32

Answer:

w = 1.766 Joule

Explanation:

Work = Force × Distance

In this case the Work done is stored in body as Gravitational potential energy, so , W = P. E. = mgh

Here m = 0.400 kg ( unit not given in the question if in other unit may be converted to Kg), g = 9.81 m/s² and h= 0.450 m

w =  0.400 kg × 9.81 m/s² × 0.450 m

w = 1.7658 kg m²/s²  =  1.766 Joule  or (Nm)

4 0
3 years ago
Read 2 more answers
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