The speed of sound through air is approximately 340 m/sec. What is the wavelength of a sound wave with a frequency of 706 Hz? Ro
1 answer:
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Answer:
The extent to which it would stretch is
Explanation:
From the question we are told that
The initial length is
The area is
The Young modulus of the steel is
The tension is
The Young modulus is mathematically represented as
Where is the stress which is mathematically represented as
Substituting values
And e is the strain which is mathematically represented as
Where The extension of the steel string
Substituting these into the equation above
Substituting values
Answer: gravitational potential energy is converted into kinetic energy
Explanation:
When the diver stands on the platform, at 20 m above the surface of the water, he has some gravitational potential energy, which is given by
where m is the man's mass, g is the gravitational acceleration and h is the height above the water. As he jumps, the gravitational potential energy starts decreasing, because its height h above the water decreases, and he acquires kinetic energy, which is given by
where v is the speed of the diver, which is increasing. When he touches the water, all the initial gravitational potential energy has been converted into kinetic energy.