Category: Physics

What changes can matter undergo? Matter can undergo changes of two basic types: physical changes and chemical changes. Physical changes are processes in which a material changes its physical appearance but not its basic identity. The evaporation of water is a physical change. What are the two kinds of changes that matter may undergo describe […]

What is the difference between non science and pseudoscience? In short, while not all non-science is pseudoscience, all pseudoscience is definitely non-science. While pseudoscience is the most dangerous subspecies of non-science, philosophical discussions of the problem of demarcation aim to extract those features that make science what it is. Does science have to be falsifiable? […]

How much is a Big Mac in Hawaii? Restaurant Menu McRib $4.35 Big Mac $6.19 Bacon Quarter Pounder with Cheese $8.13 What is considered low income in Hawaii? In 2019, according to newly-released figures from the U.S. Department of Housing and Urban Development, a single person living on Oahu is considered “low income” if they […]

What is an example of comparative advantage? Comparative advantage is what you do best while also giving up the least. For example, if you’re a great plumber and a great babysitter, your comparative advantage is plumbing. That’s because you’ll make more money as a plumber. What gives a country comparative advantage? It is being able […]

How many bodies are in the Body Farm? five bodies What are the two primary goals of the Body Farm? Download ppt “THE BODY FARM PRIMARY GOAL: To understand the processes & timetable of postmortem decay, primarily to improve determining the “time since death” in murder.” What are the five stages of decomposition? A corpse […]

What is the greatest degree of precision? pipette How precise is a cm ruler? We can say that the measuring instrument is readable to ±0.05 cm. The ±0.05 cm means that your measurement may be off by as much as 0.05 cm above or below its true value. This value is called the uncertainty or […]

Is oil really fossil fuel? Fossil fuels include coal, petroleum (oil), natural gas, oil shales, bitumens, and tar sands and heavy oils. For modern life, these energy sources rival food and water in importance. Why can’t we get rid of fossil fuels? We understand today that humanity’s use of fossil fuels is severely damaging our […]

Why is a propane torch lit inside a hot air balloon? Propane torch is lit inside a hot air balloon during pre-flight preparation because the heat from the touch is needed to heat the cold air inside the balloon, so that the air will expand and become less dense and rise, thus providing a lift […]

Is the flat side of a battery negative? The polarity of batteries is what helps them supply current to a device. The plus sign, or +, indicates the positive terminal. The negative end of the battery should be flat, and it may or may not be marked with a minus, or -, symbol. What is […]

What are the 4 elements of science fiction? Science fiction contains the usual elements of the novel: a specific setting, character development, plot (central conflict, complications, climactic events, resolution), themes, and structure. How can you tell if a story is science fiction? Science fiction is a genre of fiction in which the stories often tell […]