12.0144 cm3
12.0346 cm3
12.0288 cm3
12.0173 cm3
Correct answer is C
Linear expansivity (α)
= A2−A1A1θ
Original Area(A1) = 4 x 3 = 12
New Area (A2) = ?
Temp. rise (θ) = 100oC
A2 - 12 = 1200 x 2 x 1.2 x 10−5
A2 - 12 = 2880 x 10−5
A2 - 12 = 0.0288
A2 = 12.0288 cm2
48.6°
19.5°
20.0
45.0
Correct answer is A
Given that refractive index = 1.5, angle of incidence = 30°, angle of refraction =?
using snell's law = refractive index = sinisinr
=1n=sin30sinr
= sinr=1.5×sin30
r = sin10.75
= 48.6°
this is because ray is traveling from a more denser medium to a less dense medium
The anomalous expansion of water occurs in the range
0 °C to 100 °C
0 °C to 4 °C
4 °C to 100 C
-4 °C to 0 °C
Correct answer is B
No explanation has been provided for this answer.
Which property of a wave remains constant when the wave travels from one medium into another?
Amplitude
Wavelength
Velocity
Frequency
Correct answer is D
Frequency remains unchanged as waves travel from one medium to another because it is characterized by the source of the wave.
A device consumes 100 W of power when connected to a 120 V source. Calculate its resistance
1.2Ω
12,000 Ω
20.0Ω
144Ω
Correct answer is D
P = V2R
R = 1202100
= 144.0Ω