Category: Physics

What is chain drill? Chain drills are exercises that allow learners to practice dialogue, build vocabulary and develop clearly stated ideas about a familiar topic using repetition as the primary teaching strategy. 1. The learners build on the statements made by adjacent learners in the same way that links are added to a chain. What […]

What is rapid combustion give an example? Burning of LPG is an example of rapid combustion. In this combustion, the combustion of combustible material is complete. LPG burns rapidly and produces heat and light. What is meant by spontaneous combustion? Spontaneous combustion, the outbreak of fire without application of heat from an external source. Spontaneous […]

What is the difference between loudness and frequency? Frequency (the number of vibrations or sound waves per second) is measured in Hertz (Hz). A sound that is 4,000 Hz (like the sound the letter “F” makes) has 4,000 waves per second. Intensity (loudness) is the amount of energy of a vibration, and is measured in […]

How do you know if a spring is ideal? A ideal spring has an equilibrium length. If a spring is compressed, then a force with magnitude proportional to the decrease in length from the equilibrium length is pushing each end away from the other. How much force is needed to pull a spring with a […]

How long does aluminum take to decompose? around 250 years Why you shouldn’t drink from a can? A common ingredient in plastic bottles, Bisphenol A (or, BPA) is one of the most potentially dangerous things about a soft drink. A study from the American Heart Association in 2014 revealed that BPA leaching from cans could […]

What does a circle around a weather station mean? A small circle is plotted on the map at the location where the weather measurements were made. The circle can be filled in to indicate the amount of cloud cover. Positions are reserved above and below the center circle for special symbols that represent different types […]

Which color deviates biggest rainbow? Violet light Which Colour is deviated most? violet color Which Colour is deviated least? red Which Colour of white light is deviated I the most ii the least? (i) Violet colour will deviate the most and (ii) red colour will deviate the least. Which Colour of white light is deviated […]

Do you need a male and female apple tree to get fruit? Pollinating Apple Tree Flowers Like all fruit trees, apples need to be pollinated if they are to set fruit. This involves the transfer of pollen from the stamen (the male part of the flower) to the stigma (the female part). How many years […]

Are hot crusts more or less dense? It can get quite hot deep in the Earth’s crust. In fact, it can get so hot that the rocks that make up the crust can actually begin to melt. This molten material is called magma. It is less dense than the surrounding rock so it tends to […]

What does 0.0 mean? Surprise What does the car sticker 0.0 mean? Three types of people have the 0.0 bumper sticker: Very serious endurance athletes who think that bragging about completing a marathon is ridiculous. This could be road bicycle racers, ultra-runners, distance swimmers, triathletes, or simply serious runners who know their place. What does […]