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hjlf
3 years ago
12

Ivan finished 4/5 of his math homework problems and all 3 questions for his science homework before dinner. If he finished a tot

al of 43 problems before dinner, what is the total of math homework problems he was assigned?
Physics
2 answers:
goldenfox [79]3 years ago
7 0

Answer:

50 Is the correct answer

Explanation:

Because <u>4/5 = 0.8</u> an if you divide 50 by 0.8. 50/0.8 = 40.

And he <u>finished</u> 40 questions in math, and 3 in science.

So he has a total of 50 questions in math.

devlian [24]3 years ago
6 0

he made 40 I hope it helps you

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Amanda [17]

Answer:

Latent heatnof fusion = 417.5 J

Explanation:

Specific latent heat of fusion of water is 334kJ.kg-1.

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The amount of heat required to change 1 kg of solid to its liquid state (at its melting point) at atmospheric pressure is called Latent heat of Fusion.

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3 years ago
Two transverse waves travel along the same taut string. Wave 1 is described by y1(x, t) = A sin(kx - ωt), while wave 2 is descri
Vadim26 [7]

Answer:

6) Wave 1 travels in the positive x-direction, while wave 2 travels in the negative x-direction.

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For both cases, + and -, after a certain time \delta t (\delta t >0), the displacement <em>y</em> of the wave will be determined by the kx\pm\omega (t+\delta t) term. For simplicity, if we imagine we are looking at the origin (x=0), this will be simply \pm \omega (t+\delta t).

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<em>Note that their values don't matter, although they are a very small variation (we have to be careful since all this is inside a sin function), what matters is if they are positive or negative and as such what is possible or not .</em>

<em />

In conclusion, when kx+\omega t, the part of the wave on the positive side (\delta x>0) is the one that will go through the origin, so the wave is going in the negative direction, and viceversa.

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