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Two blocks A and B are connected to each other by a string and a spring; the string passes over a frictionless pulley as shown in the figure. Block B slides over the horizontal top surface of a stationary block C and the block A slides along the vertical side of C, both with the same uniform speed. s

The coefficient of friction between the surfaces of blocks is 0.2. Force constant of the spring is 1960 newtons/m. If mass of block A is 2 Kg., calculate the mass of block b and the energy stored in the spring.

Chemistry

The compressibility of a gas is less than unity at STP. Therefore,

(a)

V_m > 22.4 litres

(b)

V_m < 22.4 litres

(c)

V_m = 22.4 litres

(d)

V_m = 44.8 litres

Mathematics

A curve passing through the point (1, 1) has the property that the perpendicular distance of the origin from the normal at any point P of the curve is equal to the distance of P from the x-axis. Determine the equation of the curve.

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