6. Driving with parking lights only (in place of headlights) is against the law. A. True B. False
2 answers:
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Answer:
Explanation:
We know that Drag force
Where
is the drag force constant.
A is the projected area.
V is the velocity.
ρ is the density of fluid.
Form the above expression of drag force we can say that drag force depends on the area .So We should need to take care of correct are before finding drag force on body.
Example:
When we place our hand out of the window in a moving car ,we feel a force in the opposite direction and feel like some one trying to pull our hand .This pulling force is nothing but it is drag force.
Answer:
Just draw a line from point D join to point E
The triangle formed DME will be congruent to AMC
Answer:Counter,
0.799,
1.921
Explanation:
Given data
Since outlet temperature of cold liquid is greater than hot fluid outlet temperature therefore it is counter flow heat exchanger
Equating Heat exchange
=
we can see that heat capacity of hot fluid is minimum
Also from energy balance
=
NTU=1.921