Calculate the velocity of the rifle's recoil after firing m=4kg v=? m=0.010kg v=300 m/s
1 answer:
By the principle of conservation of mechanical energy, you must equal the initial energy with the final energy. The initial energy will be before firing with the following data: m = 0.010kg v = 300 m / s. The final energy will be with the mass m = 4kg and the speed to be calculated which will be V = 15 m / s. The answer is attached with the procedure.
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Answer:
14.05m/s
Explanation:
We are given that
Horizontal speed of diver=
Distance, y=-10 m
It is taken as negative because the diver goes downward.
There is no air resistance therefore, there is acceleration due to gravity .
We know that
Initial vertical velocity,
Using the formula
Using the formula
Hence, the speed of diver before just striking the water=14.05m/s
Answer:
The average diameter of a single alveolus is 0.0222 cm.
Explanation:
Volume of the lung ,V= 1.9 L
Number of alveoli in a human lung =
Volume of single alveoli =v
The alveoli are spherical.
Radius of an alveolus = r
Volume of the sphere =
Diameter of the alveolus =d
d = 2r = 2 × 0.0111 cm = 0.0222 cm
The average diameter of a single alveolus is 0.0222 cm.