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Neporo4naja [7]
3 years ago
12

The density of mercury is 13.6 g/cm3 calculate the mass of 1 cm3 of mercury

Physics
1 answer:
7nadin3 [17]3 years ago
5 0

the mass of 1cm3 of mercury is 13.6g because

the formula of density is mass/volume and when paste the number in it. you get the answer

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Two satellites A and B orbit the Earth in the same plane. Their masses are 5 m and 7 m, respectively, and their radii 4 r and 7
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Answer:

The ratio of their orbital speeds are 5:4.

Explanation:

Given that,

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Radius of A = 4 r

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The orbital speed of satellite A,

v_{A}=\sqrt{\dfrac{GM_{A}}{R_{A}}}......(I)

The orbital speed of satellite B,

v_{B}=\sqrt{\dfrac{GM_{B}}{R_{B}}}......(I)

We need to calculate the ratio of their orbital speeds

Using equation (I) and (II)

\dfrac{v_{A}}{v_{B}}=\sqrt{\dfrac{\dfrac{GM_{A}}{R_{A}}}{\dfrac{GM_{B}}{R_{B}}}}

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\dfrac{v_{A}}{v_{B}}=\sqrt{\dfrac{G\times5m\times7r}{G\times7m\times4r}}

\dfrac{v_{A}}{v_{B}}=\dfrac{5}{4}

Hence, The ratio of their orbital speeds are 5:4.

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