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Q. A transparent oil with index of refraction 1.29 spills on surface of water (index of refraction 1.33), producing a highest of reflection with normally incident violet light (wavelength 400 nm in air). Assume the highest occurs in the first order; determine the thickness of the oil slick.
Q. A ceiling fan with 80-cm-diameter blades is turning at 60rpm. Suppose the fan coasts to a stop 30s after being turned off.
1.) What is the speed of the trip of a blade 10 s after the fan is turned off?
2.) By how various revolutions does the fan turn while stopping?
While Voyager 2 sent back pictures of Neptune during its historic flyby of that planet in 1989, the spacecraft's radio signals travelled for 4 hours at the speed of light to reach Earth. How far away was the spacecraft.
An electric iron connected to a 110V source draws 9A of current.show that the amount of heat generated in one minute is almost 60 kj.
2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. If the first ball moves away with angle 30° to the original path,
Explain an experimental method for determining the center of mass of any object, including irregularly shaped objects.
A loudspeaker on a tall pole broadcasts sound waves equally in all directions. If the sound output is 7.0 W, at what distance from loudspeaker is the sound intensity level 85.7 dB.
A 12 kg object oscillates at the end of a vertical spring that has a spring constant of 1.70 x10^4 N/m. The effect of air resistance is represented by the damping coefficient b = 3N•s/m. Find the time interval that elapses while the energy of the ..
A vessel whose walls are thermally insulated contains 2.5 {rm kg} of water and 0.6 {rm kg} of ice, all at a temperature of 0.0 ^circ {rm{C}}. The outlet of a tube leading from a boiler in which water is boiling at atmospheric pressure is inserted ..
IP A uniform electric field of magnitude 6 times 10^3 ;{rm{N/C}} points upward. An empty, closed shoe box has a top and bottom that are 37 cm by 28 cm, vertical ends that are 28 cm by 21cm, and vertical sides that are 21 cm by 37 cm.
An airplane must reach a speed of 186mi/h to take off. If the runway is 488m long, what is the minimum value of acceleration that will allow the airplane to take off successfully.
What is the difference between voltage current characteristics for intrinsic and extrinsic semiconductor in both forward in addition to reverse direction.
A 23 kg boom of length 6 m is supported by a cable that has a breaking tension of 1200N. The cable is perpendicular to the boom and is attached 4.5m from the pivot. What is the utmost load that can be suspended from the end of the boom.
A shotgun fires a large number of pellets upward, with some pellets traveling very nearly vertically and others as much as 1.0o from the vertical. suppose that the initial speed of the pellets is uniformly 150ms-1 and ignore air resistance.
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