A survey team is trying to estimate the height of a mountain above a level plain. from one point on the plain, they observe that
the angle of elevation to the top of the mountain is 28 ∘ . from a point 1000 feet closer to the mountain along the plain, they find that the angle of elevation is 30 ∘ .
1 answer:
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Answer:
The force is
Explanation:
From the question we are told that
The mechanical advantage is
The load is
The height is
Generally mechanical advantage is mathematically represented as
Here E is the force that must be applied to move the piano
=>
=>
=>
Answer:
Power, P = 722.96 watts
Explanation:
It is given that,
Voltage, V = 120 V
Length of nichrome wire, l = 8.9 m
Diameter of wire, d = 0.86 mm
Radius of wire, r = 0.43 mm = 0.00043 m
Resistivity of wire,
We need to find the power drawn by this heater. Power is given by :
And,
P = 722.96 watts
So, the power drawn by this heater element is 722.96 watts. Hence, this is the required solution.