Which of the following will result in a chemical change
a. drying wood in the shed
b. burning coal in a furnace
c. melting ice to obtain water
d. evaporating alcohol into vapor

A chemical change is the change in which a new substance is formed.

Explanation:

A physical change occurs with a change in its physical state for example melting of solid ice to liquid water or condensation of water vapour to liquid water

So, Burning Coal in a furnace will be the answer as   is the new substance is produced.

All other process like drying, melting of ice ,evaporation of alcohol are examples of physical change as there is no new substance formed in it. We see only a change in the physical state of the substance.

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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