Category: Physics

Are Step-up transformers safe? Step-up/down transformers have been used for many, many years; there is nothing mysterious about them. In general they are as safe as other parts of the electrical systems . If you are worried, then I suggest you buy one from a reputable/estalished company, and make sure that it is certified (e.g., […]

How did the force get out of balance? The idea of balance of the Force, a central tenet of the Jedi Order, refers to the ideal state in which the Force exists in nature, i.e. as the light side. The presence of the dark side corrupts and destroys this natural balance, and the Jedi viewed […]

Does dissolved oxygen increase with temperature? First, the solubility of oxygen decreases as temperature increases ¹. This means that warmer surface water requires less dissolved oxygen to reach 100% air saturation than does deeper, cooler water. Third, dissolved oxygen will increase as pressure increases ¹. What are the important effects of temperature on aquatic organisms? […]

Why is cavitation bad for pumps? Cavitation causes pump performance deterioration, mechanical damage, noise and vibration which can ultimately lead to pump failure. Vibration is a common symptom of cavitation, and many times the first sign of an issue. Vibration causes problems for many pump components, including the shaft, bearings and seals. What is cavitation […]

What does light do in the photoelectric effect? In the photoelectric effect, light incident on the surface of a metal causes electrons to be ejected. The number of emitted electrons and their kinetic energy can be measured as a function of the intensity and frequency of the light. Which experiment proved the particle nature of […]

Does increasing volume increase rate of reaction? A larger surface area per volume ratio increases the areas of contact between reactant particles. This increases the chances of successful collisions. Thus the rate of reaction is increased. Why does volume not affect rate of reaction? As the gas sample volume increases (e.g. as we add more […]

What is the symbol of magnetic field? Index to magnetic terms & units in the SI Quantity name Quantity symbol Quantity symbol magnetic field strength H Φ magnetic flux density B χρ magnetic moment m J magnetic susceptibility χ M What are the two magnetic forces? The most elementary force between magnets is the magnetic […]

Which statement best describes the relationship of resistance and current? resistance is directly proportional to current because r = vi. Which statement best describes the relationship between resistance and current? Answer Expert Verified. Answer: Option (b) is the correct answer. Explanation: According to ohm’s law, the relationship between voltage, resistance, and current is that current […]

Who owns water in USA? Water corporations have identified United States public systems as potentially profitable. These are United Water, a subsidiary of the French company Suez Environment, American Water, and Siemens from Germany which acquired US Filter Corps from French Veolia Environment and runs it under the Siemens name. What does China own in […]

How many total atoms are in a glucose molecule? 1 molecule of glucose contains 6 atoms of C, 12 atoms of H, and 6 atoms of O • 1 mole of glucose contains 6 moles of C atoms, 12 moles of H atoms, and 6 moles of O atoms. 10 moles of glucose contains 60 […]