6. which of the following statements is not true for an astronomical unit?
a) it is the average distance between the sun and earth
b) it is approximately 150 million kilometres
c) it is approximately 780 million kilometres
d) it provides a more manageable way to measure astronomical distances

the answer is the first option

explanation:

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the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

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".