10) a) Constructive interference is the
superposition of two waves which are in phase to produce a resultant wave of
maximum amplitude
b)i) Distance
between the two coherent sources for the diagram 10.1 is closer than the
diagram 10.2
ii) The
vertical distance between point P and the respective coherent sources are the
same for the diagram 10.1 and 10.2
iii)
The
wavelength of the propagating water waves are the same for the diagram 10.1 and
10.2
iv)
The
distance between two consecutive antinodes for the diagram 10.2 is closer than
10.1
c)
The
distance between the two coherent sources is inversely proportional to the
distance between two consecutive antinodes
d)
During
the day, the temperature from the surrounding is higher. High temperature will
increases the kinetic energy of the particles and the density of the air particles
is decreased. Sound wave is a longitudinal wave which travels via vibration of
the particles. When the particles rises, the sound wave is refracted away from the
ground, as the result, the son could not hear his mother clearly
Modification
|
Explanation
|
Using the large
size of the boat
|
High volume boat
is able to increase the buoyant force for the boat
|
Using lower mass
and weight material
|
To reduce the
density of the boat
|
Using a strong
material, not a rigid material
|
Strong material
is able withstand the impact during the collision without crash
|
Sonar
|
Sonar is the
best to use because it has a high frequency to propagate
|
Making a high
specific heat capacity material box to store the fish
|
Heat insulator
is used to maintains the low temperature of the fish storing
|
