Category: Physics

Why is friction bad for joints? Eventually the protective cartilage over your bones wears away, allowing them to grind directly against each other. The friction is painful and stiffens the joint. Eventually it can create bone spurs. How does friction affect the body? Static friction must be overcome, by either muscle tension or gravity , […]

How does a white dwarf die? A main sequence star that lacks the mass necessary to explode in a supernova will become a white dwarf, a ‘dead’ star that has burned through all of its hydrogen and helium fuel. But the white dwarf remains hot for some time, much like a stove burner still emits […]

What religion was ancient China? Confucianism, Taoism, and Buddhism were the three main philosophies and religions of ancient China, which have individually and collectively influenced ancient and modern Chinese society. What are the 4 natural barriers of China? There are a total of eleven natural barriers surrounding China, these include the Himalayas, Yellow Sea, Mount […]

How do you test an AVR? You can do a simple test with the AVR still mounted on the AC generator. Wind the voltage trim pot up and down and see what happens to the AC generator output. You can also bench test any AVR with a variable output Autotransformer (variac) and some test load […]

What are the types of phalanges? CONTENTS Type I: Proximal Phalanges. Type II: Intermediate Phalanges. Type III: Distal Phalanges. Why are the phalanges important? The phalanges are the bones of the fingers and toes. Phalanges is the plural form of phalanx. Every other finger and toe has three phalanges (proximal, middle, and distal). The phalanges […]

How many independent variables should an investigation have? one independent variable How many independent variables can a controlled experiment have? What is an alternative to a controlled experiment? An alternative to a controlled experiment would be A CORRELATION STUDY. A controlled experiment is one in which the researcher test a hypothesis by looking for changes […]

Which Orbital has the highest ionization energy? helium Which has a higher ionization energy Na or Li? There are 11 protons in a sodium atom but only 3 in a lithium atom, so the nuclear charge is much greater. You might have expected a much larger ionization energy in sodium, but offsetting the nuclear charge […]

How do countries know when they have a comparative advantage in the production of a good? Countries have a comparative advantage in production when they can produce a good or service at a lower opportunity cost than other producers. Countries are better off if they specialize in producing the goods for which they have a […]

How do you find the height of a free falling object? Free fall means that an object is falling freely with no forces acting upon it except gravity, a defined constant, g = -9.8 m/s2. The distance the object falls, or height, h, is 1/2 gravity x the square of the time falling. How long […]

Is Onyx a black diamond? Black diamond consists of carbon molecule alone, while onyx is a type of chalcedony quartz that consists of silicon and oxygen. That’s why we say the two gemstone come from different families. Onyx is much softer, rating 7 on the scale. Therefore, a black onyx is easier to be damaged […]