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    Which newton's law describes inertia is proportional to mass?

    1.Which newton's law describes inertia is proportional to mass? 1st or 2nd? 2.An object is on a slope, the graph of v-t shows that there is negative acceleration, how do you explain it ?
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    What is meant by 'weather element

    What is meant by 'weather element" What is meant by 'weather element"
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    Global warming

    a) global temperature become lower b) the earth warms up due to CFCs is a greenhouse gas c) CFCs lead to ozone depletion and hence more ultraviolet rays come in so it is warmer CFCs is also a greenhouse gas
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    Difference between insolation and solar radiation

    Insolation.!!!what is it ? i mean what is the differnce between insolation and solar radiation.
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    HOw can an egg fall from a high placeto the ground without breaking?

    HOw can an egg fall from a high placeto the ground without breaking?
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    Will expansion increases potential energy?

    yes i mean gravity thx for solving my problem
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    Will expansion increases potential energy?

    imaginge this:first there is a 10 degree celsius water. When we heat it , then its temperature will increase . Will its potential energy changes before it change of state
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    Lenses homework problem

    An object pin is placed 20cm in front of a convex lens which is 10 cm away from a plane mirror . An inverted image is found at the same position of the object(above the object). What is the focal length? thanks
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