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Q. Can you define Solar Constant?
The luminosity of the Sun L is 3.827×1026 Watts. When the Sun is straight overhead on a clear day how many watts would we expect to illuminate a square meter of the Earth's surface?
This value is initiated by spreading the luminous flux over an imaginary sphere with its centre at the centre of the Sun and its radius equal to the Earth's distance from the Sun, 1.496 × 1011 meters.
A sphere has a surface area equal to
A = 4πr2= 4π(1.496 × 1011)2
A = 2.81 × 1023m2.
Subsequently the value we seek is L/A or 1361 W/m2. This is called the Solar Constant and is mainly useful in analyzing solar powered equipment and evaluating energy conservation methods.
Muturi is rearranging some furniture. He pushes the dresser with a force of 143 N,and there is opposing frictional force of 112 N. What is the net force ?
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i need to think of a project to assemble as soon as possible but i need some ideas.. what projects can i present??
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