We would have observed that the plate that covers the cooked food items have water droplets inside. Why? Explain.

Have you ever observed carefully the syrup that you take for cough? Why do you shake it before consuming?

In Young's experiment, the upper slit is covered by a thin glass plate of refractive index 1.4 while the lower slit is covered another glass plate having the same thickness as the first one but having refractive index Interference pattern is observed using light of wavelength 5400A. It is observed that the point P on the screen where the central maximum (n=0) fell before the glass were inserted now has 3/4 th original intensity. It is further observed that what used to be the fifth maximum earlier, lies below the point P while the sixth minimum lies above P. Calculate the thickness of the glass plate.

You might have observed on a dry day that whwn you touvh the screen of a television you get a slight shock. why does it happen?

The magnetic field inside a tightly wound, long solenoid is B= (mu_0)ni . It suggests that the field does not depend on the total length of the solenoid, and hence if we add more loops at the ends of a solenoid the field should not increase. Explain qualitatively why the extra added loops do not have a considerable effect on the field inside the solenoid.

A train covered a certain distance at a uniform speed. If the train would have been 6 km.hr faster, it would have taken 4 hours less than the schedule time. And, if train were slower by 6 km/hr, it would have taken 6 hours more than the schedule time. Find the length of the journey.

Desert does not have water.Why?Give the reason.

Represent the following situations in the form of quadratic equation: A train travels a distance of 480 km at a uniform speed. If the speed had been 8 km/h less, then it would have taken 3 hours more to cover the same distance. We need to find the speed of the train