Category: Physics

What are the 3 parameters of sound? The three parameters of sound. The character of a sound is controlled by the three distinct properties pitch, loudness and timbre. What are the types of sounds? There are two types of sound, Audible and Inaudible. Inaudible sounds are sounds that the human ear cannot detect. The human […]

How many kW does it take to heat an unvented cylinder? 7800 watts per hour to heat the tank to its required 60 degrees celsius. Therefore if you have a 120 litre tank, your hot water requirement is 7.8Kws. If you had a 300 litre tank, your requirement would be 19.5Kws. How can I survive […]

What are the 5 examples of chemical change? Examples of Chemical Changes Burning wood. Souring milk. Mixing acid and base. Digesting food. Cooking an egg. Heating sugar to form caramel. Baking a cake. Rusting of iron. What causes color change solution? As the solution becomes more acidic, the color changes from green toward red. As […]

What is the relationship between distance and light intensity? There is an inverse relationship between distance and light intensity – as the distance increases, light intensity decreases. This is because as the distance away from a light source increases, light energy becomes spread over a wider area. Does light intensity depend on distance? As you […]

How will you explain the operation of a simple electric motor? This simple electric motor works by the magnetic force F = IL x B. The current goes around the coil so that it points one direction in one end of the loop and in the other direction at the other end of the loop. […]

What is the pH of a 0.5 M solution of sodium hydroxide? 13.5 What is the pH of a 0.25 M solution of NaOH? Calculating pH To isolate the pH, work out 14 – 1 = 13. The pH of your NaOH solution is 13. What is the pOH of a 0.01 M KOH solution? […]

What causes the GDP to decrease? Any reduction in customer spending will cause a decrease in GDP. Customers spend more or less depending on their disposable income, inflation, tax rate and the level of household debt. Wage growth, for example, encourages more expensive purchases, leading to an increase in real GDP. What increases the GDP? […]

Is Clara Oswald a Time Lord? This would strongly echo the Season 6 revelation that River is Amy and Rory’s child. And that would make Clara a Time Lord, which would explain her numerous incarnations, apparent centuries of longevity, and ability to repeatedly return from the dead. How did Clara know to say pond? Clara […]

What happens if you overcharge a lithium battery? In a lithium-ion battery, overcharging can create unstable conditions inside the battery, increase pressure, and cause thermal runaway. At best, this will lead to reduced capacity and shortened life cycle, and at worst this could cause thermal runaway. Do I need a special charger for lithium ion […]

In which situation is a person doing work on an object? Answer : When a person applies force and covers distance then the person is doing work on an object. What type of force causes a change in motion? Unbalanced forces cause a change in motion, speed, and/or direction. When two forces act in the […]