weight of Ali is 500andN. he is standing on the ground with an area of 0.025 m^2 area .we can find pressure under his feet. what is it?

20000 Pa

Explanation:

Pressure is defined as the force per unit area.

Mathematically : P =F/A    where F is force and A is area

Force = 500 N

Area= 0.025 m²

P= 500/0.025

P= 20000 Pa

c)as speed changes, wavelength and frequency change.

everything changes!

ammonium chloride & tallow