The both have the unit (J) for Jules
Answer:
The velocity at the nozzle at inlet
= 3584 
Explanation:
Pressure at inlet
= 1 ×
Pa
Temperature at inlet
= 518 ° c = 791 K
Mass flow rate =
= 88.7
Gas constant for carbon die oxide is R = 189 
Mass flow rate inside the nozzle is given by the formula =
×
×
⇒
= = 1 ×
Pa
⇒ R
= 791 × 189 = 149499 
⇒
= 0.0037 
Put all the above values in above formula we get,
⇒ 88.7 =
× 0.0037 × 
⇒
= 3584 
This is the velocity at the nozzle at inlet.
Answer:
Option A is the correct answer.
Explanation:
Here momentum is conserved.
That is 
Substituting values

Speed of block A after collision = 10 m/s
Option A is the correct answer.
Because the wall reflects sound waves to your ears bouncing off of the walls, even if it's in another room.