In Regnault's apparatus for measuring specific heat capacity of a solid, there is an inlet and an outlet in the steam chamber .The inlet is near the top and the outlet is near the bottom .Why is it better than the opposite choice where the inlet is near bottom and the outlet is near the top ?

In Regnault's apparatus for measuring specific beat capcity of a solied, there is an intel and an inlet and an outlet in the sterm cahmober .The intel is near the top and the outlet is near the bottom .Why is it better than the opposite choice where the inlet is near bottom and the outlet is near the top ?

A ladders is more likely to slip when a person is near the top than when he is near the bottom. The friction between the ladder and floor decreases as he climbs up.

Explain why, the walls of a dam are thicker near the bottom than at the top .

A ladder is resting with one end on a vertical wll and the other end on a horizontal floor. Is it more likely to slip when a man stnads near the bottom or near the top?

For proper ventilation of building, windows must be open near the bottom and top of the walls so as to let pass

Water is filled to a height of 2.5 m in a container lying rest on a horizontal surface as shown in the figure. The bottom of the container is square shaped of side sqrt(3) and its top is open. There is a very small hole in the vertical wall of the container near the bottom. A small cap closes the hole. The hole gets opened when pressure near the bottom becomes more than 4 xx 10^(4) pascal a, What minimum acceleration can be given to the container in the positive x -direction so that the cap will come out of the hole? Assume water does not spill out of container when the container accelerates. Find the velocity of efflux as soon as the container starts moving with the acceleration calculated in part a. of the question.

A siphon is used to drain water (density =rho ) from a wide tank. The inlet and outlet mouth of the siphon are at the same horizontal level and the highest point of the siphon tube is at a height H from the mouth of the tube. Height of water in the tank above the tube mouth is h (see fig). Atmospheric pressure is P_(0) . (a) Will the water drain out in this siphon? if yes, at what speed (V)? (b) Find pressure at the top of the siphon tube (call in P) (c) Find pressure just inside the left mouth of the tube. (d) If left part of the tube is slightly cut short, without disturbing anything else, what effect it will have on V and P? (e) If the right end of the tube is lowered by adding more lenght of tube, it was observed that flow stops when lenght of right limb of the tube becomes H_(0) . Find H_(0) .

A cylindrical vessel of radius R and height H and open at the top is completely filled with y . A small circular hole of radius r is made near the bottom of vessel . The time taken for 25 % of water to flow out is