Arectangular plate has a length of (22.4 ± 0.2) cm and a width of (8.4 ± 0.1) cm. calculate the area of the plate, including its uncertainty.

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c