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What is the proper definition of light?
An ice-box is built of wood 1.75 cm thick, lined with cork 3 cm thick. If in the steady state the temperature of the inner surface of the cork is 0 ºC and that of the outer surface of wood is 12 ºC, what is the temperature of the wood-cork interface? The thermal conductivities of wood and cork are 0.2 W/m-K and 0.04 W/m-K respectively
Explain the advantage of fixed pulley?
Why does a tilted gyroscope not fall?
How many pounds does one gallon of water weigh?
What is the rectilinear propagation of light?
What is the force needed to accelerate a mass of one kilogram one meter per second per second?
Explain what is the translucent?
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Differentiate static and kinetic friction.
If blue light is combined with green light, what color of light is produced?
The system shown in the figure is in equilibrium. The metal spheres are identical and each has a mass of 2 kg. The surface areas of the pistons are equal and 100 square centimeters each. The density of water is 1 g per cubic centimeter. Assuming that the frictions and masses of the pistons are negligible, what is the mass of G? ( g = 10N/kg )
What affect does electricity have on soil?
What is constructive interfernce?
What is the index of refraction of air?
