An inventive child named Nick wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a rop
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Answer:
The astronaut's weight will be one-forth of her normal weight on earth.
Explanation:
From Newton's law of gravitation, we can write the acceleration due to gravity (g) on Earth's surface is given by
where 'G' is gravitational constant, '' is Earth's mass and 'R' is Earth's radius.
As shown in the figure, if the astronaut is at a height 'h' from earth's surface and if '' be the value of the acceleration due to gravity at that height, then
Taking the ratio of both the equations, and as given h = R.
So,
where 'm' is the mass of the astronaut.
So the weight of the astronaut will be one-forth her normal weight on earth.
Alkanes are hydrocarbons with general formula .
So alkane with two carbon atoms will be , alkane with four carbon atoms will be
, alkane with six carbon atoms will be
, alkane with eight carbon atoms will be
.
As the number of carbon atoms increase, the surface area will increase and thus the vanderwaal forces will also increase, and the boiling point will also increase.
Thus the approximate boiling point order is:
The approximate boiling points will be: 125° C >68° C > -1 °C > -89° C