find the percentage of error in calculation of the surface area of a sherical ballon of diameter 14.02 m. if the true diameter is 14m.

One gram of charcoal adsorbs 100 mL of 0.5 M -acetic acid to form a monolayer and the molarity of acetic acid reduces to 0.49. Calculate the surface area of charcoal adsorbed by each molecule of acetic acid. The surface area of charcoal is 3.01xx 10^2 m^2 g^(-1) .

Find the approximate change in the surface area of a cube of side x m caused by decreasing the side by 1%.

Find the difference in air pressure between the inside and outside of a soap bubble 5 mm in diameter , if the surface tension of soap solution be 1.6N/m .