Question

(a) At 20.5°C, the radius of a solid aluminum sphere is 6.50 cm.
What is the increase in the sphere's radius if it is heated to 300°C? Assume α = 22.2 ✕ 10⁻⁶ K⁻¹ and β = 66.6 ✕ 10⁻⁶ K⁻¹.

(b)

An 40-ft³ scuba tank is filled with air at room temperature (20°C) so that the gauge pressure is 2985 psi. The tank is forgotten in the Sun for hours, and the tank's temperature reaches 121°F. Ignore the slight increase in the tank's size. What is the gauge pressure at this higher temperature?

Answer 1