When the combustion engine was invented it had many positive effects on society, but years later it has been discovered that the burning of oil and coal has one major negative effect on the environment. What is that negative effect? It improves air quality

It uses renewable resources

It causes an increase in greenhouse gasses

It is sole cause for the hole in the ozone layer.

c) always accurate

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c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

the answer is 1 i believe

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.