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3 years ago

13

What is the mass number of an atom with 3 protons and 4 neutrons and 3 electrons

1 answer:

Ksenya-84 [330]3 years ago

7 0

I think its 11.....................

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Besides caffeine what other compound are found in tea leaves?

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If a radioisotope has a half-life of 4 years, how much remains of a starting amount of 40 grams after 16 years have passed?

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3 years ago

8. The time period of artificial satellite in a circular orbit of radius R is T. The radius of the orbit in which time period is

Elena-2011 [213]

Explanation:

It is given that,

The time period of artificial satellite in a circular orbit of radius R is T. The relation between the time period and the radius is given by :

$T^2\propto R^3$

The radius of the orbit in which time period is 8T is R'. So, the relation is given by :

$(\dfrac{T}{T'})^2=(\dfrac{R}{R'})^3$

$(\dfrac{T}{8T})^2=(\dfrac{R}{R'})^3$

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So, the radius of the orbit in which time period is 8T is 4R. Hence, this is the required solution.

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3 years ago

Please help quickly i have exam

katrin [286]

Answer:

ALL EXCEPT

"O and S" and "F and Cl"

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