EASY! WILL GIVE BRAINLIEST! Which of the following will result in the highest conductance?

large cross-sectional area, short pipe
large cross-sectional area, long pipe
small cross-sectional area, short pipe
small cross-sectional area, long pipe

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)

What does si stand for,when referring to a system of measurement