Category: Physics

Why is a Leclanche cell called a dry cell? Various experiments were made with cellulose, sawdust, spun glass, asbestos fibers, and gelatine. In 1886, Carl Gassner obtained a German patent (No. 37,758) on a variant of the (wet) Leclanché cell, which came to be known as the dry cell because it did not have a […]

How do you calculate the amount of heat gained or lost by the solution? Key Concepts Amount of energy released or absorbed is calculated. q = m × Cg × ΔT. q = amount of energy released or absorbed. calculate moles of solute. n = m ÷ M. n = moles of solute. Amount of […]

Can artesian wells dry up? 2 Answers. The short answer is, depending on the source of the water table, it should fill back up over time. Its also possible for the well wall to collapse in on itself now that the water isn’t there to create pressure and hold the hole walls back. Is water […]

Does frequency depend on length of tube? The wavelength is determined by the length of the pipe, but the frequency of the fundamental and the harmonics depends on the speed of sound of the gas inside the pipe. Is frequency directly proportional to length of air column? Answer. The natural frequency is inversely proportional to […]

What is mental age and chronological age? Mental age is based on your intellectual development, while chronological age is based on the calendar date on which you were born. If your chronological age and your mental age are the same, you are said to be of average intelligence. Gifted children have mental ages that are […]

Is ruby laser pulsed or continuous? Although it lases at the standard deep-red 694.3 nm wavelength, it is both diode-pumped (making it very stable and efficient) and continuous-wave (opening up many uses not available to pulsed ruby lasers). What is pulsed mode? (C) The resulting voltage pulse that is developed across the circuit of (A) […]

What part of the atom has no mass? Protons, neutrons, and electrons: Both protons and neutrons have a mass of 1 amu and are found in the nucleus. However, protons have a charge of +1, and neutrons are uncharged. Electrons have a mass of approximately 0 amu, orbit the nucleus, and have a charge of […]

What is 4 degrees celsius equal to in Fahrenheit? Celsius to Fahrenheit table Celsius Fahrenheit 1 °C 33.80 °F 2 °C 35.60 °F 3 °C 37.40 °F 4 °C 39.20 °F Is 30 degrees Celsius dangerous? Running in the 30 degree Celsius heat does not come without its risks, it can very easily cause dehydration, […]

How do you know when a system has reached equilibrium? Q can be used to determine which direction a reaction will shift to reach equilibrium. If K > Q, a reaction will proceed forward, converting reactants into products. If K < Q, the reaction will proceed in the reverse direction, converting products into reactants. If […]

What are the two continental glaciers that remain today? Today, there are only two ice sheets in the world: the Antarctic ice sheet and the Greenland ice sheet. During the last glacial period, however, much of the Earth was covered by ice sheets. Ice sheets formed like other glaciers. Snow accumulates year after year, then […]