10-cm-thick brass plates (k = 110 W/m‧K, rho= 8530 kg/m3 , cp = 380 J/kg‧K, α= 40 x 10-6 m2 /s) are cooled in an impinging jet of air at 15 o C and convective heat transfer coefficient of 220 W/m2 ‧K. The plate is initially at a uniform temperature of 600 o C and the bottom is insulated. Determine the temperature of plane that is 5 cm from the top surface after 3 minutes of cooling.

Three charge are arranged as shown in the diagram. the magnitude of the net electrical force acting on the +6 uc charge, rounded to the tenths place, is .

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?