Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
The value of T in the figure above is
30N
10.0N
20N
40N
Correct answer is D
Tsin30 + Tsin30 =40
2Tsin30 = 40
Tsin30 = 40/2 = 20
T(12) = 20
T = 20 x 2 = 40N
According to kinetic molecular model, in gases
The molecule are very fast apart & occupy all the space made available
The particles occur in clusters with molecules slightly farther apart
The particles vibrate about fixed positions and are held together by the strong intermolecular bond between them
The particles are closely packed together, they occupy minimum space & are usually arranged in a regular pattern
Correct answer is A
In kinetic molecular model, gases are energized and thus moves freely, fast as they occupy specific space
200oC
300oC
100oC
-100oC
Correct answer is D
L1 = 100cm, T1 = 200oC
L2 = 99.4cm,T2 = ?
α = 2 x 10−5C−1
α = L2−L1L1(T2−T1)
2 x 10−5=99.4−100100(T2−200)=−0.6100(T2−200)
2 x 10−5 x 100(T2−200)=−0.6
T2−200=−0.60.002=−300oC
T2=200−300=−100oC
When blue and green colours of light are mixed, the resultant colour is
cyan
magenta
black
yellow
Correct answer is A
Cyan is a bluish-green colour