Because most people really don't want or need to see what's in there.
If you want to, open the door during the cycle. It won't harm anything.
If you're curious to see a dishwasher in action, some appliance showrooms have a display model, where the spray parts and the racks are in an entirely transparent box. They're to show how powerfully and completely the stuff inside will get cleaned, but you can also see how the dishwasher is intended to work, by filling with just a couple of inches of water, and then recirculating it for the duration of the cycle, to loosen the stuff on the dishes.
Makes it easier for people to subscribe to your webpage without having to go and visit it.
Answer:

Explanation:
<u>DC Circuit</u>
The DC circuit shown it the figure has a power source (battery), some resistors, switches and voltage and current meters. The switch S1 is open, so the right branch of the circuit is neglected. Assuming all meters are ideal (no resistive losses), we have a simple series circuit made of resistors R2 and R3.
We are required to compute the total power dissipated in the circuit, which corresponds to the total power delivered by the voltage source.
The power source of V= 6V is delivering a current in the series circuit equal to the current through R1 and R3. That current is the same as that read by M1 known to be I=0.04 A
The power delivered by the source is

