A ray of light is incident on a body x as shown in the diagram above. What is the refractive index of the body?

A body of mass 7.5 kg is to be pulled up along a plane which is inclined at 30o to the horizontal. If the efficiency of the plane is 75%, what is the minimum...

Which of the following is a fundamental quantity?

A student found out from a simple pendulum experiment that 20 oscillations were completed in 38 seconds. What is the period of oscillation of the pendulum?

A car travelling at a uniform speed of 120km h-1 passes two stations in 4 minutes. Calculate the distance between the two stations.

The angular speed of an object describing a circle of radius 4m with a linear constant speed of 10 ms-1 is

A boy cycles continuously through a distance of 1.0 km in 5 minutes. Calculate his average speed

Which of the following will reduce the frequency of oscillation of a simple pendulum?

At what angle to the horizontal must the nozzle of a machine gun be kept when firing to obtain a maximum horizontal range for the bullets?