What did the experiments with a rotating paddle wheel inside the cathode ray tube prove?
a Cathode rays are made of particles that have mass.
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b Cathode rays are negatively charged.
c Cathode rays have no electrical charge.
d Cathode rays are made of massless particles.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

catya your not at all which answer i've seen you do this on another question!