Given that:
k = 500 n/m,
work (W) = 704 J
spring extension (x) = ?
we know that,
Work = (1/2) k x²
704 = (1/2) × 500 × x²
x = 1.67 m
A spring stretched for 1.67 m distance.
frequency of the ultrasound given as

speed of the wave is

Now the wavelength is given as



now we know that distance between two consecutive antinodes is always half of wavelength
so we have
d = 0.75 mm
Air pressure is proportional to the square of the wind velocity.
Wind speed is how fast wind goes and atmospheric pressure is the pressure that the atmosphere pushes on us. The greater the difference in barometric pressure from a high pressure zone to a low pressure zone, the greater the wind velocity will be.
Hope this helped!
Phosphorus is a macro element that is a component of ATP
Could be c because it matches the question