The pressure inside a tire is measured as 28.0 . What is its pressure in ?

1 pound = 4.45 newtons

1 inch2 = 6.45 centimeters2

Express the answer to the correct number of significant figures.

c.

explanation:

i do not get it   at all

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.