Two glass vessels M and N are connected by a closed valve. M
i
N
M contains helium at 20°C at a pressure of 1* 10 Pa N has been evacuated, and has three
times the volume of M. In an experiment, the valve is opened and the temperature of the whole
apparatus is raised to 100°C
What is the final pressure in the system?
A
3.18 10Pa
B
4.24 10'Pa
C 1.25 X 10 Pa
D 5.09 10 Pa

N has been evacuated, and has three times the volume of M. In an experiment, the ... of the whole apparatus is raised to 100°C. What is the final pressure in the system? A B C D 3.18 x 10* Pa 4.24 x 10* Pa 1.25 x 10Pa 5.09 x 10Pa. ... are connected by a closed valve MEN M contains helium at 20°C at a pressure of 1 10Pa.

Explanation:

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied