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People pushing, Earth displacement, rough estimate quesiton?

The Chinese government throws a big party. All citizens of China are invited to Beijing. Everyone arrives just before the big celebration day. It's so crowded that people have to sleep in the streets and alleys. At 6 AM on the big day, gongs sound simultaneously all over the city. All at once, the citizens stand up, pushing themselves upwards against the ground.

This push causes the Earth briefly to shift in the opposite direction. How large is the displacement of the Earth? All you need to do is make a rough estimate

10 ^ ? power

If there are 3 billion people with a total mass of "m" and by standing up,raise their collective center of mass, say, 1m , the the Earth of mass "M" will shift in the opposite direction an amount "x" such that
Mx = m(1)
x = (m/M)(1)

you'll have to estimate the total mass of 3 billion people, and look up the Earth's mass.

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People pushing, Earth displacement, rough estimate quesiton?

The Chinese government throws a big party. All citizens of China are invited to Beijing. Everyone arrives just before the big celebration day. It's so crowded that people have to sleep in the streets and alleys. At 6 AM on the big day, gongs sound simultaneously all over the city. All at once, the citizens stand up, pushing themselves upwards against the ground.

This push causes the Earth briefly to shift in the opposite direction. How large is the displacement of the Earth? All you need to do is make a rough estimate

10 ^ ? power

If there are 3 billion people with a total mass of "m" and by standing up,raise their collective center of mass, say, 1m , the the Earth of mass "M" will shift in the opposite direction an amount "x" such that
Mx = m(1)
x = (m/M)(1)

you'll have to estimate the total mass of 3 billion people, and look up the Earth's mass.

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