54 Formulae

Formula's used in Herons Formula

The density of phosphorus vapour at STP is 5.54 " gL"^(-1) . Hence, molecular formula of phosphorus is

Show that points A(-5,4),B(-2,-2) and C(3,-12) are colinear using distance formula .

Using the formula for squaring a binomial, evaluate the following: (i) (54)^(2) (ii) (82)^(2) (iii) (103)^(2) (iv) (704)^(2)

An organic compound on analysis gave the following results : C=54.5% ,O= 36.4 % H=9.1 % . The empirical formula of the compound is ____.

(a) Derive the formula : v= u+at , where the symbols have usual meanings. (b) A bus was moving with a speed of 54 km/h. On applying brakes it stopped in 8 seconds. Calculate the acceleration.