A dog while barking delivers about 1 mW of power. If this power isuniformly distributed over a hemispherical area, what is the sound level at a distance of5 m? What would the sound level be if instead of 1dog 5 dog start barking at the same time delivering 1 mW of power?

A dog while barking delivers about 1 mW of power. If this power is uniformly distributed over a hemispherical area, what is the sound level at a distance of 5 m? What would the sound level be if instead of 1 dog, 5 dogs start barking at the same time each delivering 1 mW of power

A person with a myopia eye cannot see objects beyond a distance of 1.5 m. What would be the power of the corrective lens used to restore proper vision ?

About 5% of the power of a 100W bulb is converted to visible radiation. What is the average intensity of visible adiation. At a distance 1 m from the bulb ?

About 5% of the power of a 100 W light bulb is converted to visible radiation. What is the average intensity of visible radiation : at a distance of 1m from the bulb ?

About 5% of the power of a 100 W light bulb is connected to visible radiation .what is the average intensity of visible radiation at the distance of 1 m from the bulb?