These waves are traveling at the same speed. Which wave has the highest frequency?
2 answers:
Answer : Highest frequency = wave A
Explanation :
The number of vibrations per second is called the frequency of the wave and the distance between two consecutive crests or troughs is called the wavelength of the wave.
The relation between the wavelength and the frequency is inverse i.e.
It is clear from the given figure that the wave (a) have least wavelength i.e the distance between two crests or troughs is least.
So, the wave (a) will have highest frequency.
Hence, the correct option is wave (a).
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Answer:
Turn the heater on
Explanation:
There are two main forces involved in a balloon flight
The downward force is the total weight of the balloon: the air it contains, the gas bag, the basket, the passengers, etc.
The upward force is the weight of the of the air the balloon displaces.
During level flight ,
buoyant force = weight of displaced air - total weight of balloon
If you increase the temperature of the air in the bag, the air molecules spread out and leave through the bottom of the bag.
The balloon still has the same volume, so the weight of displaced outside air stays the same.
However, the balloon has lost some hot inside air, so its total weight decreases.
The upward force is greater than the downward force, so the balloon rises.
