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The sun radiate a power of 3.9 x 10 ^ 26 watt in space . The earth orbits around the sun of radius of 1.5 x 10 ^11 m . What power strike at 1 m ^2 area on the earth ? The rotation aaxis of the earth is tilted by 27 degree relative to the plane of orbit. What is the intensity of sun light on the noon time at the equation on the winter days ?
During a car crash a 65 kg person's head goes from travelling at 50 km ??!??to stationary in 0.15 s. What is the magnitude of the average net force acting on the person's 4.5 kg head
It has been proposed to save fuel in air travel by reducing the air speed. How much fuel is saved in a 2000 mile trip
Calculate the Fermi energy and Fermi velocity for copper with 8.5 x 10^28 conduction electrons per cubic metre
There is a tree in the middle of your front yard and you take pictures of a squirrell as it runs around the tree. What is the displacement of the squirrell between the rst and second pictures
A uniform rectangular bookcase of height 1.63 m and width 1.03 m is to be pushed at a constant velocity across a level floor. The bookcase is pushed horizontally at its top edge, at the distance H above the floor.
A scaffold of mass 57 kg and length 6.5 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
A compact disk spins with angular velocity 40.8rad/s. The player is turned off, and 2.10s later the CD has stopped. Find its average angular acceleration
The current in a 100 watt lightbulb is 0.770A . The filament inside the bulb is 0.300mm in diameter. What is the electron current in the filament
A plane mirror and the concave mirror (f = 8.70 cm) are facing each other and are separated by a distance of 23.0 cm. An object is placed between the mirrors and is 11.5 cm from each mirror.
question1the westin stamford hotel in detroit is 228 m tall. assume a piece of ice that initially has a temperature of
q1. 1.76- block at rest on a ramp of height. while the block is released it slides without friction to the bottom of
A conducting wire formed in the shape of a right triangle with base b = 38 cm and height h = 63 cm, What is the angular frequency of rotation
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