5. Three children are at work. One is pushing a chair, another is pushing the sofa and the third one is pushing an empty trolley
1 answer:
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Answer:
option C
Explanation:
Let mass of the bullet be m and velocity be v
mass of gun be M and bullet be V
now,
using conservation of momentum for gun 1
(M+m) V' = 2 mv + 3 MV
V' = 0
3 M V = - 2 mv
momentum of gun 1 =- 2 mv---------(1)
now for gun 2
(M+m) V' = mv + MV
V' = 0
M V = - mv
momentum of gun 1 = -mv-----------(2)
dividing equation (1) by (2)
the correct answer is option C
Answer:
The flow rate is
Explanation:
From the question we are told that
The velocity is
The diameter of the pipe is
The radius of the pipe is mathematically represented as
substituting values
The flow rate is mathematically represented as
Where is the cross-sectional area of the pipe which is mathematically evaluated as
substituting values
So