How is energy transferred in a bicycle? Mechanical energy usually means the sum of the kinetic energy and potential energy. So when you ride your bike you hope that the muscular (chemical) energy is converted mainly into mechanical energy. Unfortunately friction will produce heat and sound and will reduce the amount of mechanical energy that […]
Why do electrons lose or gain electrons?
Why do electrons lose or gain electrons? Explanation: Atoms and chemical species lose or gain electrons when they react in order to gain stability. Thus, typically, metals (with nearly empty outer shells) lose electrons to non-metals, thereby forming positive ions. The number of electrons depends on their position on the Periodic table (in simple terms). […]
What would happen when an electron in AH atom absorbs light?
Which object will reach terminal velocity first?
Which object will reach terminal velocity first? A falling object will continue to accelerate to higher speeds until they encounter an amount of air resistance that is equal to their weight. Since the 150-kg skydiver weighs more (experiences a greater force of gravity), it will accelerate to higher speeds before reaching a terminal velocity. How […]
Is volume and temperature directly proportional?
Is volume and temperature directly proportional? The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles’s law). The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle’s law). Does pressure affect temperature? In a closed system where […]
How many levels of reality are there for Plato?
How many levels of reality are there for Plato? Plato believed that there were four levels or approaches to knowledge and genuine understanding. They are illustrated in the REPUBLIC in the allegory of the cave and in the divided line. What are Plato’s two levels of reality? The divided line is a visual metaphor for […]
How did the Pure Food and Drug Act affect society?
How did the Pure Food and Drug Act affect society? The Pure Food and Drug Act of 1906 prohibited the sale of misbranded or adulterated food and drugs in interstate commerce and laid a foundation for the nation’s first consumer protection agency, the Food and Drug Administration (FDA). The Pure Food and Drug Act regulated […]
How many watts does an escalator use?
How many watts does an escalator use? A continuously running escalator of the kind you’d find in airports or subway stations—35 feet high with a 40 horsepower motor—would use around 60,000 kWh annually. (For comparison’s sake, the average American home consumes 11,040 kWh in a year.) How much electricity does and elevator use? According to […]
How do you calculate the saturated vapor pressure of water?
How do you calculate the saturated vapor pressure of water? Moisture comes in several forms for materials exposed outdoors: humidity, condensation (dew), and rain. Relative humidity (RH) is the ratio of the ambient vapor pressure of water to the saturation water vapor pressure: RH=pw/ps. How do you calculate saturated pressure? Take the temperature of the […]