Because the object is still made of the same material
Density is not affected by the weight and shape of an object its affected by how concentrated the atoms are in a given volume
-- The density of the glass alone doesn't change.
-- The density of the water alone doesn't change.
-- The density of (the entire glass + everything IN IT) increases,
because the part that used to be air (with very low density) is
changed to water (with much higher density than the air had).
Answer:
5.03 m
Explanation:
The wavelength of a wave is given by

where
v is the speed of the wave
f is the frequency of the wave
For the sonar signal in this problem,


Substituting into the equation, we find the wavelength:

B. number of oscillations in a given period of time.
Speed of man towards West =2.5 m/s
Time to travel in the given direction = 1200 s
Total displacement towards west


Now speed of man towards East = 1 m/s
time to travel in east direction = 500 s
total displacement towards East


Now total displacement will be


so it is 2500 m towards west