A motor is modeled as a box with dimensions, $4^{\text{'}}{6}^{\text{'}}{1}^{\text{'}}.$ The motor is turned off and is

at a temperature of $360$ K $.$ Assume the properties for the motor as shown below.

Assume the motor is raised with an open platform. The motor is located in a room that

is at a temperature of $300$ K $.$ The convective heat transfer coefficient is also shown

below. What is the Biot number?

$k_{\text{m}\text{o}\text{t}\text{o}\text{r}}=30\frac{W}{m^{**}(K)}$;${}_{\text{m}\text{o}\text{t}\text{o}\text{r}}=5,000k\frac{g}{m^3}$;$h_{\text{a}\text{i}\text{r}}=15\frac{W}{m^2{?}^{**}(K)}$