theres two cups on a board - one half full and one empty. which one will fall off quicker while lifting the board up?
1 answer:
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Answer:
The speed of sound in dry air at 0°C is 331 meters/second
Explanation:
Sound wave is a longitudinal wave. The speed of sound depends on the density and compressibility of the medium. If the density of the medium is less, then it will have faster speed of sound and if the compressibility of the medium is high, it will have slower speed of sound.
It also depends on the temperature. At 20 degrees Celsius, the speed of sound is 343 m/s. At 25 degrees Celsius, its speed is 346 m/s and at 0 degrees Celsius, the speed of sound in dry air is 331.3 m/s
The formula is as follows :
T = 0°C
v = 331.3 m/s
or
v = 331 m/s
So, the correct option is (b) "331 meters/second".
The product in a chemical reaction is written on the Right side of the arrow, so
the product formed here in given reaction is :
- CaO (Calcium Oxide)
To solve this problem it is necessary to apply the equations related to the conservation of momentum.
This definition can be expressed as
Where
= Mass of each object
= Initial Velocity of each object
= Final velocity
Rearranging the equation to find the final velocity we have,
Our values are given as
Replacing we have,
Therefore the final velocity is 6.5m/s