Category: Physics

What is the importance of reasoning? Reasoning is the generation or evaluation of claims in relation to their supporting arguments and evidence. The ability to reason has a fundamental impact on one’s ability to learn from new information and experiences because reasoning skills determine how people comprehend, evaluate, and accept claims and arguments. What is […]

What is the difference between TE and TM waves? The difference between TE and TM mode is that TE stands for transverse electric mode while TM stands for transverse magnetic mode. TE mode is also known as H mode as there is only a magnetic field along the direction of propagation. Why TEM wave is […]

What is the most essential element to life? Carbon What level of CO2 is harmful to humans? 1000 to 2000 ppm, the air quality is low. From 2000 to 5000 ppm, CO2 concentration starts to cause problems (headaches, insomnia, nausea). It is a dirty air. From 5000 ppm, the presence of other gases in air […]

Which motor is used in washing machine? AC induction motors Which company is better for washing machine? Brands like Bosch/Siemens Washing Machines are quite popular for their front loading washing machines. Among the Indian brands, IFB leads the pack by giving tough competition to international brands, while Godrej and Onida Washing Machines have good models […]

What is the formation of Echo? Echoes. An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as […]

Is the reaction between magnesium and hydrochloric acid exothermic? The reaction between magnesium metal and hydrochloric acid is exothermic, because it released energy in the form of heat (increase of temperature). The energy required to break the bonds of the reactants were more than the energy required to make the new bonds of the products. […]

What happens to the pH of a weak acid when water is added? When water is added to a weak acid like ethanoic acid, the number of ethanoic acid molecules that dissociate increases, however, pH increases (less acidic), too. How do you calculate the pH of a dilution? How do I calculate the pH for […]

What does it take to move an electron from a lower state to a higher state? When an electron absorbs energy, it jumps to a higher orbital. This is called an excited state. An electron in an excited state can release energy and ‘fall’ to a lower state. The electron can absorb one quantum of […]

What rock layer is the youngest? Over time, the sediments pile up to form horizontal layers of sedimentary rocks. The bottom layer of rock forms first, which means it is oldest. Each layer above that is younger, and the top layer is youngest of all. What is the oldest layer of rock in the Grand […]

What is an example of shape constancy? a type of perceptual constancy in which an object is perceived as having the same shape when viewed at different angles. For example, a plate is still perceived as circular despite appearing as an oval when viewed from the side. What is shape and size constancy? Consequently, measuring […]