Answer:
Explanation:
From first law of thermodynamics
Q = ΔE + W
Q is heat added , ΔE is increase in internal energy and W is work done.
Here Q = - 963.6 kJ , - ve sign because head is absorbed
ΔE - 2836 kJ , negative sign given ( gas cooled )
Putting these values in the equation above
- 963.6 = - 2836 + W
W = 2836 - 963.6 kJ
= 1872.4 kJ .
Answer:
-14 kg m/s
Explanation:
Taking the direction "to the left" as positive direction, the initial momentum of the ball is
p1 = +8 kg m/s
while the final momentum is
p2 = -6 kg m/s
so the change in momentum is
According to the impulse theorem, the impulse exerted on the ball is equal to the change in momentum of the ball, so:
(which means 14 kg m/s to the right)
While the impulse that the ball exerted on the ball is equal and opposite in direction, so:
(which means towards the left)
The correct formula for calculating the tangential speed of an orbiting object is V(t)=wr.
V(t)= Tangential Speed
w= Angular Velocity
r= Radius of the Path
Hope this helps.
Answer:
Slip Rings
Explanation:
The wound rotor motor has a three-phase winding with each one connected to seperate slip rings. These slip rings contain brushes which form a secondary circuit where resistance can be inserted and this will allow for the rotor current to run more in phase with the stator current which will result in increased torque that is created
