I know that ultrasounds are used to determine the sex of the fetus and its general health. I’m not sure about infrasounds.
You need to find the acceleration . a=v-vo/t
a=6-10/4
a=-4/4
a=-1m/s/s or -1m/s^2
You’re welcome :)
Answer:
3.1 m/s
Explanation:
First, find the time it takes for the cat to land. Take down to be positive.
Given:
Δy = 0.61 m
v₀ = 0 m/s
a = 9.81 m/s²
Find: t
Δy = v₀ t + ½ at²
(0.61 m) = (0 m/s) t + ½ (9.81 m/s²) t²
t = 0.353 s
Now find the horizontal velocity needed to travel 1.1 m in that time.
Given:
Δx = 1.1 m
a = 0 m/s²
t = 0.353 s
Find: v₀
Δx = v₀ t + ½ at²
(1.1 m) = v₀ (0.353 s) + ½ (0 m/s²) (0.353 s)²
v₀ = 3.1 m/s
The equation for frequency:
Frequency = (wave speed) / (wavelength)
Units of frequency: "per second", or "Hertz"
Wavelength equation:
Wavelength = (wave speed) / (frequency)
Wavelength is just a length. The unit is 'meters'.
(or centimeters, or millimeters, or nanometers, if the frequency is very high)