Why would an electrician use parallel circuits to wire the lights in each room of a house instead of using a series circuit?
a.
when electricians get their license, they are only licensed to install parallel circuits. most electricians aren't certified to install series circuits.
b.
parallel circuits prevent electrons from flowing if part of the circuit is broken and therefore prevent fires. series circuits cause more fires because electrons still flow.
c.
electrons continue to flow in a parallel circuit even if part of the circuit is broken. in a series circuit, a break such as a burned out lightbulb would cause the current to stop in the whole room.
d.
parallel circuits are much easier to wire and are required by the electrical code for housing construction in most communities. series circuits are sometimes used with special approval.

Dying the folding patterns of protein molecules can microbiologists better understand cellular processes as well as some diseases, such as alzheimer’s, that are caused by proteins that have misfolded. the folding of these complicated molecules can be simulated on computers, but it takes a lot of processor power and time for even expensive supercomputers to do this. a group of researchers at stanford university developed software that can be used to distribute the processing of data to anyone who is willing to donate time on their idle personal computers. as a result, the researchers have been able to achieve protein-folding simulations that are far better than those other computing methods have done. which statement best describes the work of these researchers? the work is not scientific because the data are not processed in one location. the work is not scientific because the simulations are not reproducible. the researchers applied creativity to solve a problem in running an experiment. the researchers used only well-established scientific techniques.

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?