Carbon dioxide is released when limestone is heated during the production of

Physics

1 answer:

Archy [21]2 years ago

6 0

Answer:

Calcium

Explanation:

Because limestone is mainly calcium carbonate, CaCO3, which when heated breaks down to form calcium oxide and carbon dioxide.

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An astronaut is floating happily outside her spaceship, which is orbiting the earth at a distance above the earths surface equal

serg [7]

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

$g = \dfrac{GM_{e}}{R^{2}}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(1)\\$

where 'G' is gravitational constant, ' $M_{e}$ ' 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 ' $g'$ ' be the value of the acceleration due to gravity at that height, then

$g' = \dfrac{G M_{e}}{(R + h)^{2}}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(2)$

Taking the ratio of both the equations, and as given h = R.

$\dfrac{g'}{g} &=& \dfrac{g' = \dfrac{G M_{e}}{(R + h)^{2}}}{g' = \dfrac{G M_{e}}{(R + h)^{2}}}\\&=& \dfrac{R^{2}}{(R + h)^{2}}\\&=& R^{2}(R + R)^{2}\\&=& \dfrac{1}{4}\\$

So,

$&& g' = \dfrac{g}{4}\\&or,& mg' = \dfrac{mg}{4}$

where 'm' is the mass of the astronaut.

So the weight of the astronaut will be one-forth her normal weight on earth.

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If a spear is thrown at a fish swimming in a lake, it will often miss the fish completely. Why does this happen?

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The image shows an example of white light entering a prism and coming out as colors of the rainbow. How does a prism a produce t

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The answer is C because when white light enters a prism, its gets separated into component colors which are red, orange, yellow, green, blue, indigo, and violet. This can also be referred to as <span>dispersion.</span>

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A skateboarder is attempting to make a circular arc of radius r = 16 m in a parking lot. The total mass of the skateboard and sk

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To solve this problem we will apply the concepts related to the centripetal force, for which it is necessary to equate it with the static friction force of the body. From this, we will clear the speed and replace with the given values. Our values are defined as,

$r = 16m$