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AleksAgata [21]
4 years ago
6

Calculate ΔE for a process in which a system performs 4.34 kJ of work and absorbs 12.43 kJ of heat. Express your answer to two p

laces past the decimal in units of kJ (don't include units in your answer).
Physics
1 answer:
Anettt [7]4 years ago
5 0

Answer:The change in internal energy , \Delta E is 8.09 kJ

Explanation:

According to first law of thermodynamics:

\Delta E=q+w

\Delta E=Change in internal energy

q = heat absorbed or released  = +12.43 kJ  (heat absorbed is positivew = work done or by the system  = - 4.34 kJ (Work done by the system is negative) 

\Delta E=+12.43kJ+(-4.34)=8.09kJ

Thus change in internal energy is 8.09 kJ

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Harrizon [31]
Hey can you please help me?
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3 years ago
Which wave, A or B, has lower energy? A, because it has a higher amplitude B, because it has a higher amplitude A, because it ha
frutty [35]

Energy of wave depends on its amplitude and it is given as

E = \frac{1}{2} kA^2

here k = constant

A = amplitude

so energy will increase or decrease depends on the amplitude of the wave

So here if we need to check which wave has lower energy then we need to compare the amplitude.

If the amplitude is less then energy must be less

So please check in the figure that which wave out of A and B has lesser amplitude to find out the wave of lesser energy

5 0
3 years ago
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Two Forces 20N and 50N act at a point and at an angle of 120 to each. Draw a force diagram for the system​
Cerrena [4.2K]

the resultant force is F=F1-F2.

F1 = 20 N, and F2 = 50 N

In this instance, two different resultant forces are feasible.

when the two are at an angle of A with one another.

See the outcome in case 1 of the image if both are facing the same way. if they are both facing the opposite directions. when both are at a zero-degree angle from one another If they are parallel to one another and moving in the same direction, the resultant force is F=F1+F2. If they are parallel but moving in the opposite direction, the resultant force is F=F1-F2.

Learn more about resultant force here-

brainly.com/question/16380983

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7 0
2 years ago
Which of the following represents the wavelength of a wave?
dlinn [17]

Answer: D. the distance between the highest points of consecutive waves

Explanation:

The wavelength of a wave is defined as the <em>distance traveled by a periodic perturbation that propagates through a medium in a given time interval</em>. It is usually represented by \lambda and can be calculated if the frequency of the wave is known, since there is an inverse relationship between both.

In the specific case of a periodic sine wave (which is the way in which a wave is usually represented graphically) the wavelength can be determined as the distance between two consecutive maxima of the disturbance.

Therefore, the correct option is D.

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3 years ago
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Answer:

The correct answer is -

19 - C) parasitism

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Explanation:

Parasitism is a type of symbiotic relationship among two different organisms where one is benefited and the other is harmed. The harmed organism known as the host and the benefitted organism called the parasite. For instance, tapeworms are parasites in the human body.

Commensalism is also a symbiotic relationship but in this relationship, one symbiont is benefitted but another one neither benefitted nor harmed. For instance, Hermit crabs use the shells of dead snails for homes.

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