4 x 108ms-1
2.25 x 108ms-1
\(\frac{4}{9}\) x 108ms-1
2.25 x 102ms-1
4.33 x 108ms-1
Correct answer is B
Air to water = \(\frac{\text{speed in air}}{\text{speed in water}}\)
\(\frac{4}{3}\) = \(\frac{3 \times 10^8}{V}\)
4V = 3(3 x 108)
V = \(\frac{3(3 \times 10^8)}{4}\)
V = 2.25 x 108ms-1
The small droplet of water that forms on the grass in the early hours of the morning is ...
The effective capacitance between points X and Y in the diagram below is 1.0μF, What is the value...
Which of the following type of motion does a body undergo when acted upon by a couple? ...
The effect of closing the key K in the circuit shown in the figure above would be to? ...
Which of the following statements on the use of X-rays is incorrect? X-rays are used ...
In which of these fields are repulsive forces NOT experienced? I. Magnetic field II. Gravitati...