Answer:
Same frequency, shorter wavelength
Explanation:
The speed of a wave is given by


where,
f = Frequency
= Wavelength
It can be seen that the wavelength is directly proportional to the velocity.
Here the frequency of the sound does not change.
But the velocity of the sound in air is slower.
Hence, the frequency remains same and the wavelength shortens.
A) 500 calories
B)5000 joules
C) 5 kilocalories
Answer is C
You can observe this law in practice if <span>a ray of light reflects off of a flat mirror.
</span>
Law of reflection states that both direction of both incoming and outgoing rays of light make the same angle with respect to surface normal.
Answer:
3.8 m/s²
Explanation:
Average acceleration is the change in velocity over change in time.
a = Δv / Δt
a = (25 m/s − 0 m/s) / 6.5 s
a ≈ 3.8 m/s²