2 years ago

Answer ASAP:

Physics

2 answers:

vampirchik [111]2 years ago

8 0

B because hurricanes typically need warm water to form and during the summer it's warm enough for one to form.

Artemon [7]2 years ago

5 0

I think its B

maybe D

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Using energy considerations, calculate the average force (in N) a 67.0 kg sprinter exerts backward on the track to accelerate fr

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Answer:

$F_{sprinter}=110.4N$

Explanation:

Given data

Mass m=67.0 kg

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Initial Speed vi=2.00 m/s

Distance d=25.0 m

Force F=30.0 N

From work-energy theorem we know that the work done equals the change in kinetic energy

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And

$W=F_{total}.d$

$W=1/2mv_{f}^2-1/2mv_{i}^2\\F_{total}=\frac{1/2mv_{f}^2-1/2mv_{i}^2}{d} \\F_{total}=\frac{1/2(67.0kg)(8.00m/s)^2-1/2(67.0kg)(2.00m/s)^2}{25.0m} \\F_{total}=80.4N$

and we know that the force the sprinter exerted Fsprinter the force of the headwind Fwind=30.0N

$F_{sprinter}=F_{total}+F_{wind}\\F_{sprinter}=80.4N+30N\\F_{sprinter}=110.4N$

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2 years ago

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Write the chemical formula for the following diagrams.

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Answer:

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2 years ago

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Likurg_2 [28]

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One of the harmonics of a string fixed at both ends has a frequency of 52.2 Hz and the next higher harmonic has a frequency of 6

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Solution :

Frequency may be defined as the number of observation or number of waves that is taken in per unit time. The unit of frequency is Hertz or Hz.

It is given that :

Successive harmonic frequencies, f = 52.2 Hz

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Therefore, fundamental frequency, F = f' - f

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