Answer:
C
Explanation:
The speed of a molecule is directly related to its kinetic energy, which is directly related to the temperature. As the temperature increases, so does a molecule's speed. Of the options provided, only option C has a higher speed than 500m/s.
I guess it's found below the horizon? maybe. or it could be B.
Answer:

Explanation:
Given that
Train 1 (observer):
Speed = 109 km/h
Train 2 (source):
Speed = 99 km/h
Train 2 emitting frequency = 500 Hz
We know that observer and source are moving toward each other, then frequency heard by observer can be given as follows

Where C is the velocity of sound (C=1225 Km/h)
Now by putting the values



Answer:
Simply drop the egg from one inch above your foot and it will not break.
Explanation: