Many homes have what are called cavity walls with two layers of brick or blocks between the inner rooms and the world outside and an air gap between the walls. The air gap reduces heat losses from the walls by both conduction and convection: conduction, because heat can't conduct through ...
What will happen to the convection currents in the mantle if the Earth's interior eventually cools down? From a plate tectonic perspective, how does the orogenic activity that occurred in the Cordilleran mobile belt during the Mesozoic Era differ from that which took plac...
What are the factors that affect the flow of fluid in pipes and tubes? Explain 2 factors that affect surface tension. Briefly describe what is meant by each of the following and illustrate with an example: (a) steady fluid flow; (b) non-steady fluid flow; (c) rotational fluid flow...
What are solid-state transformers? You will have gathered from reading what's above that transformers can be very big, very clumsy, and sometimes very inefficient. Since the mid-20th century, all kinds of neat electric tricks that used to be carried out by large (and sometimes mechanical) co...
Free convectionis based on an difference in density. What is colder is typically denser, so gravity forces it downwards, displacing what is hotter (and less dense) upward (This should not be confused withforced convection, which uses fans or other devices that are not practical to build on ...
What is the relationship between air pressure and an adiabatic process? How does a gasoline combustion engine work? How does gasoline work in a combustion engine? How does Charles's law apply to breathing? Explain how convection currents are produced in the air. How did Joseph Priestley create...