Answer:
The angular acceleration of the blades is .
Explanation:
Given that,
Initial angular velocity of the blade of fan,
Final angular velocity of the blade of a fan,
Time, t = 5.95 s
The angular acceleration of the blades is equal to the rate of change of its angular velocity. It is given by :
So, the magnitude of the angular acceleration of the blades is .
True
This is due to the taking outage in into the object.
e.g. You can take a cookie from the cookie jar and add another one into it
Answer:
The heat change of the system is 30 J.
Explanation:
Given;
increase in internal energy of a system, ΔU = 80 J
work done on the system, W = 50 J
The heat change of the system can be calculated from first law of Thermodynamics;
ΔU = Q - W
where;
Q is the heat absorbed by the system
W is the work done by the system (negative when work is done by the system and positive when work is done on the system)
Since work was done on the system the increase internal energy is given as;
ΔU = Q + W
ΔU - W = Q
80 J - 50 J = Q
30 J = Q
Therefore, the heat change of the system is 30 J.
(15.9 - 15.6) / 15.9 × 100% (because the actual weight is 15.9)
1.8868% = 1.89%
Answer: D
Hope it helped!