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 1121:
A man will exert the greatest pressurewhen he?
Options:
A) lies flat on his back
B) lies on his belly
C) stands on both feet
D) stands on the toes of one foot
Show Answer
The correct answer is D .
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Question 1122: If a body mass 5kg is thrown vertically upwards with velocity u,at what height will the potential energy equal to the kinetic energy?
Options:
A) h =(u)2/g
B) h = (u)2/4g
C) h = (2u)2/g
D) h = (u)2/2g
Show Answer
The correct answer is B .
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Question 1123: If it takes an object 3s to fall freely to the ground from a certain height, what is the distance covered by the object?
Options:
A) 90 m
B) 30 m
C) 45 m
D) 60 m
Show Answer
The correct answer is C .
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Question 1124: Two balls X and Y weighing 5 g and 50 kg respectively were throne up vertically at the same time with a velocity of 100 ms1 .How will their positions be one second later?
Options:
A) X and Y will be 500 m from each other
B) Y will be 500 m ahead of X
C) X will be 500 m ahead of Y
D) X and Y both be 500 m from the poin of throw
Show Answer
The correct answer is D .
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Question 1125: Which of the following pairs of musical instruments produce sound due to the vibration of air column?
Options:
A) Bell and piano
B) Guitar and flute
C) Trumpet and drum
D) Trumpet and flute
E) Violin and organ
Show Answer
The correct answer is D .
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Question 1126: The velocity ratio of an inclined plane where angle of inclination in θ is
Options:
A) Sinθ
B) Cosθ
C) Tanθ
D)
Show Answer
The correct answer is D .
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Question 1127: The resistances of platinum wire at the ice and steam points are 0.75 ohm and 1.05 ohm respectively. Determine the temperature at which the resistance of the wire is 0.90 ohm
Options:
A) 43.0oC
B) 50.0oC
C) 69.9oC
D) 87.0oC
Show Answer
The correct answer is B .
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Question 1128:
An air bubble of radius 4.5 cm initially at a depth of 12 m below the water surface rises to the surface. If the atmospheric pressure is equal to 10.34 m of water, the radius of the bubble just before it reaches the water surface is
Options:
A) 6.43 cm
B) 8.24 cm
C) 4.26 cm
D) 5.82 cm
Show Answer
The correct answer is D .
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Question 1129:
Aluminium is sometimes used as the leaf of an electroscope because it
Options:
A) is a light material
B) is a good conductor
C) is a good insulator
D) can be converted into thin sheets
Show Answer
The correct answer is D .
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Question 1130: Which of the following electromagnetic waves has the highest frequency?
Options:
A) utra - violet rays
B) radio waves
C) x - rays
D) infrared - rays
Show Answer
The correct answer is C .