Answer:
Sound quality
Explanation:
Loudness refers to the property of sound that depends on the amplitude of the sound wave while pitch is the property of sound that depends on the frequency of the sound wave.
Now, when sounds have the same pitch and loudness, it means they possess the same natural frequency and also, they will have similar resonance and standing waves. Despite all these similarities, the quality of these sounds will tend to vary from one to another.
Heat required to raise the temperature of water is given as

here we have
m = 100 g = 0.100 kg
s = 4183 J/kg C

now we can use the above equation


so here it requires 20920 J heat to raise the temperature of 100 g water by 50 degree C
Answer:A
Explanation:
Given
Skier A takes straight, smooth route while Skier B takes curvy, bumpy route to finish.
We know gravity is conservative in nature i.e. work done against it is independent of path followed
So work done by gravity for A and B is same
According to Work energy Theorem Change in the kinetic Energy is equal to work done by all the forces.


where h=vertical height of hill
thus 
which is same for both A and B
Answer:
187.37 m
Explanation:
The wavelength of an electromagnetic wave is given by:

where
c is the speed of light
f is the frequency
We see that the wavelength is inversely proportional to the frequency: this means that the shortest am wavelength will occur at the highest am frequency, which is

And substituting also the speed of light

We find the wavelength:
