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.
70
62
80
42
Correct answer is A
Relative Humidity= partialpressureofH2OsaturatedvaporpressureofH2O×100%
S.v.p. of water at 40°c = 55.3
⇒ Relative Humidity= 38.855.3×100%
Relative Humidity= 70%
195 m
271 m
391 m
136 m
Correct answer is C
U= 75 ms−1 =22º, g= 10 ms−2 , R=?
R= U2sin2θg
⇒R= 752×sin2(22)10
⇒R= 5625×Sin4410
⇒R= 5625×0.694710
⇒R= 3907.6910
⇒ 391m
[Take g = 9.8 ms-2]
T1 = 2864 N, T2= 3612 N
T1= 3612 N, T2 = 2864 N
T1= 3502 N, T2= 2760 N
T1 = 2760 N, T2 = 3502 N
Correct answer is C
W = mg = 220 x 9.8 = 2156 N
⇒Sin 38º = 2156T1
⇒ T1 = 2156Sin38
⇒ T1 = 3502 N
Cos 38º = T2T1
⇒ T2 = 3502 x Cos 38º
⇒ T2 = 2760 N
; T1 = 3502 N, T2 = 2760 N.
(i), (iii) and (iv) only
(i), (ii) and (iv) only
(ii), (iii) and (iv) only
(i), (ii) and (iii) only
Correct answer is B
Electrical conduction of gas is applied in:
(i) The identification of gases
(ii) Lighting/fluorescent tubes
(iii) Advertising industry/Neon signs
(iv) Cathode ray oscilloscope/T.V. tubes
The property of wave shown in the diagram above is?
Diffraction
Refraction
Polarisation
Interference
Correct answer is A
Diffraction is the bending of waves around the corners of an obstacle or through an aperture.