One of the Mars Rover vehicles, Sojourner, collected red Martian dust on its wheels as it rolled along. There is very little water on Mars, so it's not mud; it's actually dust. Explain, in detail, why the
dust clings to the wheels. Be sure to describe forces by name and mention charging by induction,
conducting, or rubbing, if it is appropriate. Also explain what atoms on Mars must be composed
of.

Which is not true about oxygen-17 and oxygen-18?

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 is a view of science and psychology that says the value of knowledge depends on its usefulness? a. pragmatism b. psychotherapy c. physiology