Answer:
True
Explanation:
Convection is a form of heat transfer that is predominantly common in fluids especially liquid and gas.
It occurs by the movement of a part of substance from one place to another based on density and temperature differences.
A typical convection cell is made up of a liquid that is heated. The liquid part close to the heat source becomes warmer and rises due to its low density. The part away from the heat source is more dense and begins to sink.
This analogy is commonly demonstrated in a boiling pot of water.
Answer:
10.16 minutes
Explanation:
14 min 34.56 s = 14*60 + 34.56 = 874.56 seconds
The speed of record swimming is distance over time
v = 1500 / 874.56 = 1.715 m/s
0.65 miles = 0.65 * 1609 = 1045.85 m
The time it takes to swim 0.65 miles (1045.85 m) at the rate of 1.715 m/s is
t = s/v = 1045.85 / 1.715 = 609.77 s or 609.77 / 60 = 10.16 minutes
Answer:
100 N force have to lift for the board to be carried
Explanation:
Given data
L = 3.00 m
F1 = 60.0 N
w = 160 N
to find out
magnitude F2 of force
solution
we know that F1 and F2 sum is equal to weight of board
so that we can say
F1 + F2 = W
so
F2 = W - F1
put the value W and F1
F2 = 160 - 60
F2 = 100 N
so 100 N force have to lift for the board to be carried
Answer:
n=770,880.
Explanation:
Given that
P= 2200 MW
Power of wind farm = 0.4 or 40%
So the power produce by wind farm = 0.4 x P
P'=0.4 x 2200 MW
P'=880 MW
P'=880,000 KW
We know that
1 year = 365 days
1 day = 24 hr
So
1 year = 365 x 24 hr
1 year = 8760
So the energy produce in one year
E= 8760 x P'
E= 8760 x 880,000 KW
Given that average house hold use 10,000 KW-hr
So lets take total n number of house hold use power
E= n x 10,1000
n=770,880.