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PHY101 Physics Online Quiz

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we phy101 quixex sir n0t psy101 :(

Phy101 k share kere bhai jaan plz ....

Quiz # 1 Fall 2013 Solved By SONO

Question # 1 of 5 ( Start time: 05:02:08 PM )  Total Marks: 1  
A force of 5000N is applied outwardly to each end of a 5.0-m long rod with a radius of 34.0 cm and a Young’s modulus of 125 × 108 N/m2. The elongation of the rod is:  
Select correct option:  
 
 0.0040mm
 0.14mm
 0.55mm (Correct)
 1.42mm
 
 
An object attached to one end of a spring makes 20 complete oscillations in 10 s. Its period is:  
Select correct option:  
 
 2Hz
 0.5 s (Correct)
 0.5Hz
 2 s
 
Question # 3 of 5 ( Start time: 05:04:59 PM )  Total Marks: 1  
back and forth in a leftward and rightward direction. This type of wave is known as a ____.  
Select correct option:  
 
 Mechanical
 Electromagnetic
 Transverse
 Longitudinal (Correct)
 
Question # 4 of 5 ( Start time: 05:06:27 PM )  Total Marks: 1  
Which of the following statements about completely submerged objects resting on the ocean bottom is correct?  
Select correct option:  
 
 The buoyant force acting on the object is equal to the object’s weight.
 The apparent weight of the object depends on the object’s density. (Correct)
 The displaced volume of fluid is greater than the volume of the object.
 The weight of the object and the buoyant force are equal and opposite.
 
Question # 5 of 5 ( Start time: 05:08:03 PM )  Total Marks: 1  
The flow rate of blood through the average human aorta is about 9.0 ? 101 cm3/s. If the aorta has a radius of 1.0 cm, what is the velocity of the blood flow?  
Select correct option:  
 
 14 cm/s
 32 cm/s
 37 cm/s
 29 cm/s (Correct)

BR,

SONO

Quiz # 2 Fall 2013 Solved By SONO

Question # 1 of 10 ( Start time: 09:42:03 PM )  Total Marks: 1  
A laser in a compact disc player generates light that has a wavelength of 780 nm in air. The light then enters into the plastic of a CD. If the index of refraction of plastic is 1.55, the speed of this light once enter the plastic is ________.  
Select correct option:  
 
 3.00 x10^8 m/s
 1.94 x 10^8 m/s (Correct)
 4.29 x 10^8 km/h
 3.00 x 10^8 km/h

Question # 2 of 10 ( Start time: 09:42:41 PM )  Total Marks: 1  
The quantum number ms is most closely associated with what property of the electron in an atom?  
Select correct option:  
 
 Magnitude of the orbital angular momentum
 Energy
 z component of the spin angular momentum (Correct)
 z component of the orbital angular momentum
 
Question # 3 of 10 ( Start time: 09:43:13 PM )  Total Marks: 1  
Metal pipes, used to carry water, sometimes burst in the winter because:  
Select correct option:  
 
 Metal contractst more han water
 Outside of the pipe contracts more than the inside
 Metal becomes brittle when cold
 Water expands when it freezes (Correct)
 
 
Question # 4 of 10 ( Start time: 09:44:19 PM )  Total Marks: 1  
An erect object is in front of a convex mirror a distance greater than the focal length. The image is:  
Select correct option:  
 
 Real, inverted, and smaller than the object
 Virtual, inverted, and larger than the object
 Real, inverted, and larger than the object
 Virtual, erect, and smaller than the object (Correct)

Question # 5 of 10 ( Start time: 09:45:48 PM )  Total Marks: 1  
Select the correct statement:  
Select correct option:  
 
 Ultraviolet light has a longer wavelength than infrared (Correct)
 Blue light has a higher frequency than x rays
 Radio waves have higher frequency than gamma rays
 Gamma rays have higher frequency than infrared waves
 
Question # 6 of 10 ( Start time: 09:46:50 PM )  Total Marks: 1  
A virtual image is one:
Select correct option:  
 
 toward which light rays converge but do not pass through
 from which light rays diverge but do not pass through (Correct)
 from which light rays diverge as they pass through
 toward which light rays converge and pass through
 
Question # 7 of 10 ( Start time: 09:47:39 PM )  Total Marks: 1  
The wavelength of light beam A is twice the wavelength of light beam B. The energy of a photon in beam A is:  
Select correct option:  
 
 half the energy of a photon in beam B (Correct)
 one-fourth the energy of a photon in beam B
 equal to the energy of a photon in beam B
 twice the energy of a photon in beam B

Question # 8 of 10 ( Start time: 09:49:09 PM )  Total Marks: 1  
Evidence for the wave nature of matter is:  
Select correct option:  
 
 Electron di?raction experiments of Davisson and Germer (Correct)
 Thompson’s measurement of e/m
 Young’s double slit experiment
 The Compton s’ e?ect
 
 
Question # 9 of 10 ( Start time: 09:50:36 PM )  Total Marks: 1  
Evidence that a gas consists mostly of empty space is the fact that:  
Select correct option:  
 
 The density of a gas becomes much greater when it is liquefied (Correct)
 Gases exert pressure on the walls of their containers
 Gases are transparent
 Heating a gas increases the molecular motion
 
Question # 10 of 10 ( Start time: 09:51:53 PM )  Total Marks: 1  
In a photoelectric effect experiment at a frequency above cut off, the stopping potential is proportional to:  
Select correct option:  
 
 the energy of the least energetic electron before it is ejected
 the energy of the least energetic electron after it is ejected
 the energy of the most energetic electron before it is ejected
 the energy of the most energetic electron after it is ejected (Correct)

BR,

SONO

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