Why do we use convex surface for side view mirror?

Why do we see water droplets on outer surface of a glass containing ice - cold water?

Why do we see water droplets on the outer surface of a glass containing ice - cold water?

Why do we get instant energy from glucose?

Why do we often sneeze when we inhale a lot of dust-laden air?

Answer the following: (a) The top of the atmosphere is at about 400 kV with respect to the surface of the earth, corresponding to an electric field that decreases with altitude. Near the surface of the earth, the field is about 100 Vm^(-1) . Why then do we not get an electric shock as we step out of our house into the open? (Assume the house to be a steel cage so there is no field inside!) (b) A man fixes outside his house one evening a two metre high insulating slab carrying on its top a large aluminium sheet of area 1m^(2) . Will he get an electric shock if he touches the metal sheet next morning (c) The discharging current in the atmosphere due to the small conductivity of air is known to be 1800 A on an average over the globe. Why then does the atmosphere not discharge itself completely in due course and become electrically neutral? In other words, what keeps the atmosphere charged? (d) What are the forms of energy into which the electrical energy of the atmosphere is dissipated during a lightning? (Hint: The earth has an electric field of about 100 Vm^(-1) at its surface in the downward direction, corresponding to a surface charge density = –10^(–9) Cm^(–2) . Due to the slight conductivity of the atmosphere up to about 50 km (beyond which it is good conductor), about + 1800 C is pumped every second into the earth as a whole. The earth, however, does not get discharged since thunderstorms and lightning occurring continually all over the globe pump an equal amount of negative charge onthe earth.)

Why the use of Aspartame is limited to cold foods and soft drinks?

What do you observe in the surroundings in terms of cooling or heating when water vapour is getting condensed (AS_1)

When we press the bulb of a dropper with its nozzle kept in water , air in the dropper seems to escape in the form of bubbles. Once we release the pressure on the bulb , water gets filled in the dropper. The rise of water in the dropper is due to

Write two properties of equipotential surfaces. Depict equipotential surface due to an isolated point charge. Why do the equipotential surfaces get closer as the distance between the equipotential surface and the source charge decreases?