At what cold-reservoir temperature (in ∘c) would a carnot engine with a hot-reservoir temperature of 420 ∘c have an efficiency of 60 % ?

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b.colder climates near the equator c.large waves on the cost of europe d.warm climates in northern europe

What type of context clue you understand the meaning of  quandary?

Why does ammonia, nh3, behave as a base when it reacts with an acid? z