Category: Physics

Why is Pluto white? Pluto is the only place other than Earth in our solar system that’s known to have white-peaked mountains, but these white caps aren’t made of snow. Instead, they’re made of methane frost. The mountains are made of water ice, as temperatures on this dwarf planet can drop as low as minus […]

What are the main components of the high pressure side of a refrigeration system? The 6 Main Components of a Refrigeration System Thermostatic Expansion Valve (TXV) Before the evaporator, this is located at the end of the liquid line. Evaporator. The sole purpose of the evaporator is to remove the unwanted heat from the product […]

Why are there 2 switches in my room? It’s possible that the second switch goes to a nearby receptacle (which may have been designed that way with the idea that a lamp would be plugged in there) or, alternatively, it is for a ceiling fan that may not be present (the wiring is roughed into […]

What is the Trypanophobia? Trypanophobia is defined as extreme fear of medical procedures involving injections or needles. What is Ommetaphobia? Ommetaphobia describes an extreme fear of eyes. Like other phobias, this type of fear can be strong enough to interfere with your daily routine and social activities, while also being considered irrational because of the […]

What is the equation for the change in momentum? The impulse experienced by the object equals the change in momentum of the object. In equation form, F • t = m • Δ v. What happens in an inelastic collision? An inelastic collision is a collision in which there is a loss of kinetic energy. […]

What is the difference between Adam Smith and Karl Marx? Their main difference is that Smith largely looks backward, sees that things are better than they were, and offers various reforms to improve society. Marx looks largely to the future, thinks that the future could be so much better than the present, and argues for […]

How many earthquakes does Alaska have? Alaska has 11% of the world’s earthquakes, and 3 of the six largest in recorded history were located there. Since 1900, Alaska has had one magnitude 7 or 8 earthquakes per year, 45 earthquakes of magnitude 6 or 7, and 10,000 quakes overall annually. Why does Alaska get so […]

What kind of heat transfer happens when the sun is hitting your body? Review for Heat Transfer Quiz A B Convection The transfer of heat by the movement of a fluid. Feeling the sun’s heat on your face is an example of which kind of heat transfer? Radiation What kind of heat transfer occurs when […]

Is net force always 0? When an object moves with constant velocity, the total net force on the object is always zero. If you have applied force, there’s another force (or, many forces) like friction to counterbalance it. Is normal force equal to mg? Normal force is equal to mg only when the object is […]

What type of energy is wasted? Heat energy is the most easily dissipated form of energy. Light energy is frequently energy seen in combustion, and is a type of wave motion. Sound energy is another type of wave motion caused by the vibration of molecules in the air. Like heat energy, sound is a type […]