Answer:
Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. ... Velocity is the rate at which the position changes. The average velocity is the displacement or position change (a vector quantity) per time ratio.
Explanation:
Answer:
They are both mechanical waves
Answer:
The value is 
Explanation:
From the question we are told that
The volume of the bottle is 
The gauge pressure of the air is 
Generally the volume of air before the bottle is turned upside down is



Generally the volume air when the bottle is turned upside-down is


From the the mathematical relation of adiabatic process we have that

Here r is a constant with a value r = 1.4
So


Answer:
there are uncountable sun are there but sun is star therefore there are uncountable stars are there