Probability of getting a blue pen , => p/30 = 1/2 => p = 15 So, number of black pens = 30 – 15 – 9 = 6 Required ratio = 15 : 6 = 5:2
The speed of a fast moving electron, having total energy of 2 MeV, is nearly:
The colour of sky appears blue due to –
What does the slope of a velocity-time graph represent?
If lift is going up with acceleration, the apparent weight of a body is -
When do spring tides occur?
What is the unit of the refractive index?
Which of the following pair regarding sound is correct?
I. Loudness – depends on amplitude
II. Shrillness – depends on frequency
In circular motion the direction of velocity changes at _______ points.
A body is thrown upward with an initial velocity of 20m/s. How much time will it take to reach its maximum height. (g=10m/s)
If a force is applied to two stationary objects with different masses for the same duration, what will be the same for both objects?
