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Mechanical Advantage = Force by Hammer / Force by Nail = 160/40 = 4
Answer:
sound travel fastest through solids this is because molecules in a solid media much closer together then throws in a liquid or gas flowing sound ways to travel more quickly throw it in fact sound waves travel over 17 times faster throw Steel then through air
When we apply brackes. It help car to stop
Answer:

Explanation:
To calculate the period we need the formula:

Where
is the radius of the moon,
is the universal constant of gravitation and
is the mass of mars.
The period of Phobos:

The period of Deimos:

The ratio of the period of Phobos and Deimos:


Most terms get canceled and we have:

According to the problem

so the ratio will be:
≈ 
the ratio of the period of revolution of Phobos to that of Deimos is 0.2528