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3 years ago

The magnitude of an earthquake is a number that represents the

Geography

2 answers:

Bumek [7]3 years ago

4 0

Answer:

Strength of an earthquake? Is that what you're looking for?

Explanation:

MA_775_DIABLO [31]3 years ago

4 0

The "magnitude" of an earthquake is a number that represents the total amount of <em>energy</em> released during its quaking, shaking, rocking, and rolling.

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3 years ago

As countries develop do they have more or less of an ecological impact on earth

vovangra [49]

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3 years ago

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3 years ago

3. A space vehicle is traveling at 4300 km/h relative to Earth when the exhausted rocket motor (mass 4m) is disengaged and sent

kvv77 [185]

Answer: Vce= 4234.4km/hr or 1180m/s

Explanation:

Mass of rocket motor Mr= 4m

Mass of control module Mc= m

Initial velocity of spaceship relative to earth Vs= 4300km/hr

Final velocity of command module relative to the rocket motor Vrc = 82km/hr

Total mass of spaceship M= 4m+m= 5m

Using law of conservation of momentum;

MVs= MrVre + McVce eqn1

Vre = Vrc+Vce eqn2

Where Vce is velocity of control room relative to the earth and Vre is velocity of rocket motor relative to the earth

Substituting eqn2 to eqn1, we have.

MVs= Mr(Vrc+Vce) +McVce

MVs= MrVrc+MrVce+McVce

Making Vce the subject of formula.

Vce = (MVs-MrVrc)/(Mc+Mr)

Substituting the values we have,

Vce = (5m×4300km/hr - 4m×82km/hr)/ (m+4m)

Vce = 21172m/5m

Vce= 4234.4km/hr or 1180m/s

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3 years ago