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anygoal [31]
3 years ago
15

The wavelength of a wave on a string is 1.2 meters. If the speed of the wave is 60 meters/second, what is its frequency? A. 0.20

hertz B. 2.0 hertz C. 50 hertz D. 10 hertz E. 15 hertz
Physics
1 answer:
anastassius [24]3 years ago
8 0

Answer:

50 Hz

Explanation:

The frequency of a wave is given by

f=\frac{v}{\lambda}

where

v is the speed of the wave

\lambda is the wavelength

In this problem,

v = 60 m/s

\lambda=1.2 m

So the frequency is

f=\frac{60 m/s}{1.2 m}=50 Hz

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A 66.0 kg diver is 3.10 m above the water, falling at speed of 6.10 m/s. Calculate her kinetic energy as she hits the water. (Ne
castortr0y [4]

Kinetic energy as she hits the water is 3300 joule.

To find the answer, we need to know about the Newton's equation of motion.

<h3>What's the Newton's equation of motion to determine the final velocity?</h3>
  • The final velocity is determined as

V²=U²+2aS

  • V= final velocity, U= initial velocity, a= acceleration and S= distance
<h3>What's the final velocity of the driver falling from 3.10m with initial velocity of 6.10m/s?</h3>
  • Here, a= 9.8m/s², U= 6.10m/s and S= 3.10m
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<h3>What's the kinetic energy of the driver when touches the water?</h3>

Kinetic energy= 1/2×mass×velocity²

= 1/2 × 66 × 10²

= 3300J

Thus, we can conclude that the kinetic energy of the driver is 3300 Joule.

Learn more about the kinetic energy here:

brainly.com/question/25959744

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3 0
2 years ago
A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to
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Answer:

The correct option is;

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According to Newton's law of gravitation, there is an attractive force between all objects given by the following relation;

F = G×M₁×m₂/r²

Where;

G, M₁, m₂, and r are constant such that we have;

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So the acceleration of the textbook as it is being attracted by the force of gravity towards the ground (Earth) is remains constant.

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3 years ago
A car starts from rest and travels for 5.8 s with a uniform acceleration of 1.6 m/s² in the negative direction. What is the fina
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Answer:

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We have given that the car starts from the rest so initial velocity of the car u = 0 m /sec

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