Answer:
Liquid
Explanation:
Water...
- below 0 degrees Celsius is a solid.
- above 0 degrees Celsius is a liquid.
- above 100 degrees Celsius is a gas.
In a quarter of an hour it will travel 1/4 x 90 = 22.5Km
Answer: True
Explanation:
Because plants have an increase in vigar to grow
Answer:
the frequency of the second harmonic of the pipe is 425 Hz
Explanation:
Given;
length of the open pipe, L = 0.8 m
velocity of sound, v = 340 m/s
The wavelength of the second harmonic is calculated as follows;
L = A ---> N + N--->N + N--->A
where;
L is the length of the pipe in the second harmonic
A represents antinode of the wave
N represents the node of the wave

The frequency is calculated as follows;

Therefore, the frequency of the second harmonic of the pipe is 425 Hz.