Related Questions

Statement I When a gun is fired, i.e. it placing pushes back with much less velocity than the velocity of the bullet.
Statement II Velocity of the recoiling gun is less because the gun is much heavier than bullet.
According to the Principle of conservation of momentum when the gun is fired, momentum of gun and bullet system remains constant.
The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:
The chemical which used in dry cleaning is/are
1. carbon tetrachloride, commercial dry cleaner powder
2. petrol, benzine
3. telcum powder, sulphur powder
4. French chalk, fuller Earth
Select the correct answer
In an overburden bench of an iron ore mine the following data were found:
Height = 10m
Burden = 4m
Spacing = 3m
Sub-grade drilling length = 1m
Collar stemming length = 3m
If the diameter of the explosive column is 150 mm and the specific gravity of explosive and that of rock are 0.9 and 2.4 respectively, the powder factor in te/kg will be
A bullet weighing 200 g is fired horizontally with a velocity of 25 m/sec from a gun carried on a carriage which together with the gun weighs 100 kg. The velocity of recoil of the gun, will be
A gun fires a bullet of mass 50g with a velocity of 30m/s. Because of this, the gun is pushed back with a velocity of 1m/s. The mass of the gun is?
35 kg of type A sandal powder, which costs Rs. 614 per kg, was mixed with a certain amount of type B sandal powder, which costs Rs. 695 per kg. Then the mixture was sold at the rate of Rs. 767 per kg and 18% profit was earned. What was the amount (in kg) of type B sandal powder in the mixture ?
The widest explosive limit is of __________ , thereby making it the most explosive gas.
What is a mixture of potassium nitrate, powdered charcoal and sulphur called?
A surface mine blast design has 9 holes in a row, each of 8m length and 200mm diameter. The spacing and burden are 6m and 5m respectively. The length of subgrade drilling is 1m and the density of in-situ rock is 2.43 t/m3. Considering an explosive density of 0.9 t/rn3 and stemming length of 2m, the powder factor from the blast in t/kg is