Equivalent resistance: What is the equivalent resistance between points P & Q?

(None of the resistors are the same and the wires are without resistors.)​​

Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.