The following devices use plane mirrors in their operations, except
periscope
sextant
kaleidoscope
binoculars
Correct answer is D
No explanation has been provided for this answer.
The ability of a wave to spread around corners is called
polarisation
dispersion
diffraction
reflection
Correct answer is C
No explanation has been provided for this answer.
5.0m
40.0m
50.0m
80.0m
Correct answer is D
\(\lambda = \frac{v}{f} = \frac{20}{0.25} = 80\)
temperature
wind
the amount of water vapour in the atmosphere
atmospheric pressure
Correct answer is D
No explanation has been provided for this answer.
1500J
10000J
10500J
15000J
Correct answer is C
Q = ML + C\(\theta\)
= 0.5 x 1000 + 0.5 x 2000 x 10
= 10500