Category: Physics

What is the difference between absorption and reflection? Reflection means that they are thrown back from a surface; absorption means that they are incorporated by a surface and transformed into heat energy. Different surfaces reflect and absorb differently. The ratio between absorption and reflection is called albedo. What is P in Beer’s law? Absorption takes […]

Who can run faster Boy or girl? Males develop bones faster. Some girls run faster than boys and some boys run faster than girls. Girls may not develop bones as fast as males do because girls are mature and their growth changes at a young age. What should I eat to run faster? Power foods: […]

What is the L quantum number? The angular quantum number (l) describes the shape of the orbital. Orbitals have shapes that are best described as spherical (l = 0), polar (l = 1), or cloverleaf (l = 2). They can even take on more complex shapes as the value of the angular quantum number becomes […]

What kind of a wave is sound? These particle-to-particle, mechanical vibrations of sound conductance qualify sound waves as mechanical waves. Sound energy, or energy associated with the vibrations created by a vibrating source, requires a medium to travel, which makes sound energy a mechanical wave. How ECHO is created? An echo is made by sound […]

Why is US not a Commonwealth country? But to answer your question, because the United States was part of the first British Empire and not part of the second British Empire means that it was not invited to join the British Commonwealth which was later renamed Commonwealth of Nations. The US, OTOH, became independent in […]

What is a sample space diagram? A sample space diagram is a maths table showing all the possible outcomes or results of events. It is used for probability questions. For example, the sample space of flipping a coin is heads or tails! What is possibility diagram? A Probability Space Diagram, or Sample Space Diagram, shows […]

Does energy have momentum? Light indeed carries energy via its momentum despite having no mass. Public Domain Image, source: Christopher S. Baird. In the above equation, E is the total energy of the particle, p is the momentum of the particle (which is related to its motion), c is the speed of light, and m […]

What are the main factors that affect density altitude? There are three important factors that contribute to high density altitude: Altitude. The higher the altitude, the less dense the air. Temperature. The warmer the air, the less dense it is. Humidity. 80 oF. 90 oF. 100 oF. 110 oF. 120 oF. How does the temperature […]

Why is determinism bad? Soft determinism suggests that some behaviors are more constrained than others and that there is an element of free will in all behavior. However, a problem with determinism is that it is inconsistent with society’s ideas of responsibility and self control that form the basis of our moral and legal obligations. […]

Are combustion engines more efficient? How efficient are engines? Combustion engines are stupefyingly inefficient. Most diesel engines do not even have a thermal efficiency of 50%. Of every gallon of diesel burned by a combustion engine, less than half of the energy generated becomes mechanical energy. How long will internal combustion engines be around? The […]