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Lelu [443]
3 years ago
15

HELP ME PLEASEEEEEEEEEEEEEE

Physics
1 answer:
rjkz [21]3 years ago
7 0

Answer:

The one you have selected is correct.  :)

Explanation:

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In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the sys
son4ous [18]

Answer:

2500 J

Explanation:

We can solve the problem by using the first law of thermodynamics:

\Delta U =U_f - U_i =Q-W

where

Uf is the final internal energy of the system

Ui is the initial internal energy

Q is the heat added to the system

W is the work done by the system

In this problem, we have:

Q = +1000 J (heat that enters the system)

W = +500 J (work done by the system)

Ui = 2000 J (initial internal energy)

Using these numbers, we can re-arrange the equation to calculate the final internal energy:

U_f = U_i + Q-W=2000 J+1000 J-500 J=2500 J

3 0
3 years ago
Which wavelength of the electromagnetic spectrum are shorter than visible light and carry more energy
geniusboy [140]

Answer:

C

Explanation:

Which wavelength of the electromagnetic spectrum are shorter than visible light and carry more energy

A micro

B radio

C ultraviolet

F infrared

The correct answer is C

The visible light wavelength is of 7 × 10^-7 m while the ultraviolet is of other

4 × 10^-8 m

Therefore, ultravolet is shorter than visible light and carry more energy

Therefore, the correct answer is option C.

7 0
3 years ago
A 7 kg suitcase and a 12 kg suitcase are dropped from the same second story window at the same time. If there is no wind resista
Natali5045456 [20]

Explanation:

the correct answer is C.

if there is no wind resistance; in vaccum both will hit the ground at the same time.

hope this helps you and if possible please mark me as BRAINLIST.

4 0
3 years ago
Compare and contrast lava and magma
earnstyle [38]
Magma<span> is made up of molten rock, and it is stored in Earth's crust. </span><span> When the volcano erupts, magma flows out of the volcano, it is usually mixed with steam and gas, which is called lava.</span>
4 0
3 years ago
Igneous rocks are formed from _____.
Leni [432]

Answer:

magma

Explanation:

actually cooling and solidification of magma

7 0
3 years ago
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