Answer:
(Option C)
Explanation:
The initial and final speed of the toolbox is found by means of the Principle of Energy Conservation:
The impact is calculated by means of the Principle of Momentum Conservation and the Impulse Theorem:
Answer:
Explanation:
speed of motor (N)=1500 rpm
power=4 hp = =2.9828 KW
service factor(k)= 2.75
now,
torque rating
Answer:
Parallel
Explanation:
The devices are connected in parallel.
This is because the wiring of the standard home is done in such a manner that all the outlets are in parallel.
The outlets are kept in parallel connection so that appliance connected to each outlet should receive equal amount of voltage i.e the voltage received at the house.
Answer:
-4.6431 kW
Explanation:
Given parameters:
kg/s
kJ/kg·K
° C
Let the work done on the fan be = -300 W = -0.3 kW
Let the heat loss by air from the duct be = -300W = -0.3 kW
We are asked to find the power rating of the electric resistance heating element,
Energy-Balance equation for the system is:
kW
Here, (-) sign means work done on the system.