The density changes with pressure for which fluid ? Give reason.

Is pressure a scalar or a vector ? Give reason.

State which of the following statements are true and which are false ? Give reasons for your choice. the degree of a constant term is zero.

Two circular coil A and B are placed close to each other . If the current in coil A is changed , will some current be induced in coil B ? Give reason .

(a) Pressure decreases as one ascends the atmosphere . If the density of air is rho ,what is the change in pressure dp over differential height dh ? (b) Considering the pressure P to be proportional to the density find the pressure P at a height h if the pressure on the surface of the earth is P_(o) . (c ) If P_(o)=1.03xx10^(5)N//m^(-2),rho_(o)=1.29kg//m^(3)andg=9.8m//s^(2) what height will the pressure frop to (1)/(10) the value at the surface of earth ? (d) This model of the atmosphere works for relatively small distance .Identify the underlying assumption that limits the model.

State which of the following are polynomials and which are not ? Give reasons. 2x^(3)

State which of the following are polynomials and which are not ? Give reasons. p^(-2)+1