If a balloon is squeezed, what happens to the pressure of the gas inside the balloon? a. it increases. b. it stays the same. c. it decreases. d. the pressure depends on the type of gas in the balloon.

Option (a) is the correct answer.

Explanation:

Pressure is defined as the force applied on per unit area.

Mathematically,          Pressure =

When we squeeze a balloon then it means we are applying pressure on it. Also, we are decreasing the area of balloon by applying more amount of force on it.

As area is inversely proportional to pressure. So, a decrease in area will lead to an increase in pressure.

Hence, we are increasing the pressure on the balloon by squeezing it.

Thus, we can conclude that if a balloon is squeezed, then pressure of the gas inside the balloon increases.

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.