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Explain how a convection current forms when a pan of water is being heated over a stove

The covection current forms because the base of the pan heats up as it gains energy from the stove via conduction, the pan then subsequently heats the water that is close to the bottom. As the water gains he...
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Answered by Jack H. Physics tutor
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Balance the equation: C4H8 + O2 goes to CO2 + H2O

Balance the carbon atoms first by adding a 4 in front of the CO2, Then balance the hydrogen atoms by adding a 4 in front of the H2O, Count up the number of oxgens on the right hand side: (4 2)+(4 1)=12 There...
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Answered by Jack H. Chemistry tutor
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Describe how water moves through the cells of a plant

Water moves via osmosis; this process is where water moves from an area of higher water potential to an area of low water potential with no energy required to be inputed into the system.
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Answered by Jack H. Biology tutor
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Differentiate: 6x^2 + 5x +7 =y

6x^2 + 5x +7 =y dy/dx = 12x + 5 To solve for a point of inflection: dy/dx = 12x + 5 = 0 x=-5/12 y=143/24
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Answered by Jack H. Maths tutor
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Why, in a thermal flask, does having a vacuum layer help keep the coffee warm?

Heat is transferred by 3 processes, conducation, convection and radiation. Having a vacuum layer stops heat being transferred away from the coffee by conduction. Conduction works by air molecules bumping int...
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Answered by Benjamin O. Physics tutor
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