The total momentum of the system has to be conserved to satisfy the principle of conservation of momentum. Before the ball hits the bottle, the momentum of the system is 0.4 x 18 = 7.2 kg m/s
The momentum of the bottle after being hit is 0.2 x 25 = 5 kg m/s
So the momentum of the ball now is 7.2 - 5 = 2.2 kg m/s
Hence its velocity is 2.2/0.4 = 5.5 m/s
The substance which is a liquid fuel used in rocket engines is liquid oxygen. The correct answer is A.
Answer
Force will be 1520.2604 N
Explanation:
We have given mass of the bullet m = 10.1 gram = 0.0101 kg
Distance S= 0.6 m
Final velocity v = 425 m/sec
Initial velocity u will be 0 m/sec
From third equation of motion 
We know that force is given by F = ma
So force = 0.0101×150520.833 = 1520.2604 N
Answer:
2kg
Explanation:
Whereas weight of an object depends on acceleration due to gravity, the mass remains constant because the number of atoms in an element remains constant. Therefore, despite the variation of acceleration due to gravity on moon and earth, the mass will remain 2 kg but tge weight will change.
I beieve that it is either B or C, I was never good in chemistry.
