Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.
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Question 911: A radioactive element has a half life of 4 days. The fraction that has decayed in 16 days is?
Options:
A) (15)/16
B) (1)/16
C) (3)/4
D) (1)/4
Show Answer
The correct answer is A .
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Question 912: When the bottom tip of a vibrating tuning fork is held in contact with a wooden box, a louder sound is heard. This phenomenon is known as
Options:
A) beats
B) echoing
C) resonance
D) reverberation
Show Answer
The correct answer is C .
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Question 913: Find the frequencies of the first three harmonics of a piano string of length 1.5m, if the velocity of the wave on the string is 120ms-1
Options:
A) 40Hz, 80Hz, 120Hz
B) 80Hz, 160Hz, 240Hz
C) 180Hz, 360Hz, 540Hz
D) 369Hz, 180Hz, 90Hz
Show Answer
The correct answer is A .
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Question 914:

In the diagram above, which of the angles , , and is the angle of deviation of the ray of light passing through the glass prism XYZ?
Options:
A)
B)
C)
D)
Show Answer
The correct answer is C .
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Question 915: In a common emitter configuration, the output voltage is through the
Options:
A) Resistor
B) Base
C) Collector
D) Emitter
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The correct answer is D .
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Question 916: The motion of the moving skin of a talking drum can rightly be described as
Options:
A) translational
B) random
C) rotational
D) oscillatory
E) transitory
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The correct answer is D .
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Question 917:
A few grains of table salt were put in a cup of cold water, kept at constant temperature and left undistributed. Eventually all the water tested salty. This action isdue to?
Options:
A) convection
B) osmosis
C) capillarity
D) diffusion
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The correct answer is D .
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Question 918:

For what value of 6 are the forces in the diagram above in equilib4ruim
Options:
A)
B)
C)
D)
Show Answer
The correct answer is D .
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Question 919: Two tuning forks of frequency 256Hz and 260Hz are sounded close to each other. What is the frequency of the beats produced?
Options:
A) 2Hz
B) 4Hz
C) 8Hz
D) 258Hz
Show Answer
The correct answer is B .
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Question 920: In a hydraulic press , a force of 40N is applied on the effort piston of area 0.4m2. If the force exerted on the load piston is 400N, the area of the large piston is
Options:
A) 4m2
B) 8m2
C) 2m2
D) 1m2
Show Answer
The correct answer is A .