The human body has an average temperature of `98^(@)F`.Assume that vapour pressure of the blood in the veins beahaves like that of pure water. Find the minimum atmosphric pressure which is necessary to prevent the blood from boling. Use figure of the text for the vapour.

The human body has an average temperature of 98^(@)F . Assume that vapor pressure of the blood in the veins behaves like that of pure water. Find the minimum atmospheric pressure which is necessary to prevent the blood from boiling. Use figure for the vapor pressures.

The human body has an average temperature of 98^(@)F . Assume that vapor pressure of the blood in the veins behaves like that of pure water. Find the minimum atmospheric pressure which is necessary to prevent the blood from boiling. Use figure for the vapor pressures.

A lake filled with water has depth H, A pipe of length slightly less than H lies at the bottom of the lake. It contains an ideal gas filled up to a length of (H)/(10) A smooth an ideal gas filled up to a length gas in place. Now the pipe is slowly raised to vertical position (see figure). Assume that temperature of the gas remains Constant and neglect the atmospheric pressure. (a) Plot the variation of pressure inside the lake as a function of height y from the base. Let the height of piston frm the base, after the pipe is made vertical, by y. plot the variation of gas pressure as a function of y in the first graph itself. (b) In equilibrium the gas pressure and the pressure due to water on the piston must be equal. Using this solve for equilibrium height y_(0) of the piston. You get two answers. Which one is correct and why?

If an additional pressure Delta p of a saturated vapour over a convex spherical surface of a liquid is considerably less than the vapour pressure over a plane surface, then Delta p = (rho_v//rho_l) 2 alpha//r , where rho_v and rho_l) are the densities of the vapour and the liquid, alpha is the surface tension, and r is the radius of curvature of the surface. Using this formula, find the diameter of water droplets at which the saturated vapour pressure exceeds the vapour pressure over the plane surface by eta = 1.0 % at a temperature t = 27 ^@C . The vapour is assumed to be an ideal gas.

(i) A non uniform cube of side length a is kept inside a container as shown in the figure. The average density of the material of the cube is 2 rho where rho is the density of water. Water is gradually fille din the container. It is observed that the cube begins to topple, about its edge into the plane of the figure passing through pointA, when the height of the water in the container becomes (a)/(2) . Find the distance of the centre of mass of the cube from the face AB of the cube. Assume that water seeps under the cube. (ii) A rectangular concrete block (specific gravity =2.5) is used as a retatining wall in a reservoir of water. The height and width of the block are x and y respectively the height of water in the reservoir is z=(3)/(4)x . the concrete block cannot slide on the horizontal base but can rotate about an axis perpendicular to the plane of the figure and passing through point A (a) Calculate the minimum value of the ratio (y)/(x) for which the block will not begin to overturn about A. (b) Redo the above problem for the case when there is a seepage and a thin film of water is present under the block. Assume that a seal at A prevents the water from flowing out underneath the block.