Answer:
Explanation:
Density is defined as mass ler unit volume, expressed as
Where m is mass, 
is density and v is the volume. For a sphere, volume is given as
Replacing this into the formula of density then
Given diameter of 2.24 in then the radius is 1.12 in. Substituting 0.82 lb for m then
Third one
15,000,000 ohms because M=10^6
Answer:
There are six conditions
1. Poles should contain some residual flux.
2. Field and armature winding must be correctly connected so that initial mmm adds residual flux.
3. Resistance of field winding must be less than critical resistance.
4. Speed of prime mover of generator must be above critical speed.
5. Generator must be on load.
6. Brushes must have proper contact with commutators.
Explanation:
Answer:
21.456 kJ/h
Explanation:
See the figure attached. In this case
Coefficient of performance in heat pump is defined by
Now it is necessary to change units, remember that Watt (W) is defined as J/s
