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Problem: Suppose you are underwater, wearing Polaroid sunglasses. Looking upward toward the water's surface, you view the setting sun by seeing light rays from the sun that strikes the water at an angle of incidence of 75°. The intensity of the incident sunlight is 200 W/m2.
1- What is the intensity of the light you see?
If possible just a brief explanation how you got the answer?
A dolphin located in sea water at a temperature of 25°C emits a sound directed toward the bottom of the ocean 100 meter below. Find how much time passes before it hears an echo
A rubber ball is dropped from rest 3.0m onto level ground. Bouncing back, the ball loses 25% of its mechanical energy. To what height does it rebound
At time t=0s, a wheel has an angular displacement of zero radians and an angular velocity of (+28) rad/s. Calculate the average angular velocity in the interval from t=0 to t=20
A car traveling at a speed of 55 has its brakes applied at A, reducing speed at a rate of (-t/4) mph/s where t is in seconds. Find cars speed and acceleration
While preparing tea water in a mine shaft deep underground, you notice that water boils at 105 C. what is your depth below the surface
A gas changes in volume from 0.870 m3 to 0.200 m 3 at a constant pressure of 1.30*105 Pa. How much work is done on the gas? How much work is done by the gas on its environment?
A monochromatic beam of light is absorbed by a collection of ground-state hydrogen atoms in such a way that six different wavelengths are observe, what is the shortest wavelength
A blackbody is emitting radiation at a rate of 25 W at 27oC. what is the rate of emission
The escape speed from the Earth is 1.12*104 m/s, so that a gas molecule travelling away from Earth near the outer boundary of the Earth's atmosphere would, at this speed, be able to escape from the Earth's gravitational field and be lost to the atmos..
a an ideal gas occupies a volume of 3.0-cm3 at 20degc and atmospheric pressure. determine the number of molecules of
When two tuning forks of 128 Hz and 149 Hz, respectively, are sounded simultaneously, how various beats per second are heard.
A 2.00 kg block is placed against a spring on a frictionless 26° incline. The spring, whose spring constant is 19.8N/cm, compute the elastic potential energy of the compressed spring
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