Answer:
A )
Explanation:
This change in frequency observation occur due to doppler effect
if the wave source moves,In the time between one wave peak being emitted and the next, the source will have moved so that the shells will no longer be concentric. The wavefronts will get closer together in front of the source as it travels and will be further apart behind it. (see the graph)
when the person standing still in front of the ambulance, he will observe a <em>higher frequency </em>than before as the source travels towards them.
The pitch we hear depends on the frequency of the sound wave.
A high frequency corresponds to a high pitch
as we hear a higher frequency , it makes the <em>pitch higher</em> too
The difference between the parts of the plot with positive slope and the parts with negative slope can be found below.
<h3>What is a slope?</h3>
A slope in a graph is the ratio of the vertical and horizontal distances between two points on a line. Slope shows both steepness and direction of values.
A slope can either be positive or negative depending on the relationship between the variables being plotted.
A positive slope means that the variable are directly related while the negative slope means that two variables are negatively related.
A positive slope further means that the line moves upward when going from left to right on the graph while with the negative slope, the line moves down when going from left to right.
Learn more about slope at: brainly.com/question/2491620
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Answer:
a) 
, b) 
, c) 
Explanation:
a) The equation of state for ideal gas is:
Given the existence of an isothermal process, the following relation is derived:
The volume of the other tank is:
The total volume is:
b) The total mass is:
c) The pressure of the gas in the two tanks is:
Answer:
the moon has different gravitational force.
Plasma is made up of about 90% water. It also has salts and enzymes.
Plasma has:
- no fixed shape
- no fixed volume
- are less dense than liquids and solids
