Answer:
the power that can be generated by the river is 117.6 MW
Explanation:
Given that;
Volume flow rate of river v = 240 m³/s
Height above the lake surface a h = 50 m
Amount of power can be generated from this river water after the dam is filled = ?
Now the collected water in the dam contains potential energy which is used for the power generation,
hence, total mechanical energy is due to potential energy alone.
= m(gh)
first we determine the mass flow rate of the fluid m
m = p×v
where p is density ( 1000 kg/m³
so we substitute
m = 1000kg/m³ × 240 m³/s
m = 240000 kg/s
so we plug in our values into (
= m(gh) kJ/kg )
= 240000 × 9.8 × 50
= 117600000 W
= 117.6 MW
Therefore, the power that can be generated by the river is 117.6 MW
Answer:
The distance travel by block before coming to rest is 0.122 m
Explanation:
Given:
Mass of block
kg
Initial speed of block

Final speed of block

Coefficient of kinetic friction 
Ramp inclined at angle
28.4°
Using conservation of energy,
Work done by frictional force is equal to change in energy,

Where 



m
Therefore, the distance travel by block before coming to rest is 0.122 m
Answer:

Explanation:
given,
dia of wheel = 66 cm
radius = 33 cm = 0.33 m
mass of wheel = 1.90 Kg
speed of wheel = 230 rpm
time to hold the tire = 3.10 s
Normal force = 2.7 N
coefficient of friction = 0.46
final angular speed = ?
we know
F = μ N
F = 0.46 x 2.7 = 1.242 N
torque
τ = F r
τ = 1.242 x 0.33 = 0.409 Nm
moment of inertia for wheel
I = MR²
I = 1.90 x 0.33²
I = 0.2069 kg m²
we now,
τ = I x α
α = 1.981 rad/s²
we know,




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The age of earth is determined truly by the RADIOCARBON MATHOD . In this method we can find the actuall age of anything having carbon .
Hope it helps you.