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Physics

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Rodrigo Schoen

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Cards in this guide (9)
Density is equal to

mass divided by volume.
Density equals mass per unit volume and it is expressed in gcm-3 or kgm-3 .

Force is path-dependent and will change an object's total mechanical energy

nonconservative force

Does An object's buoyant force and weight mean the same thing

no because buoyant means how much can an object float and weight means how much it weighs.

Everything in or on water pushes some water aside even if it's just a little bit What is this called

This is called "displacement", as the weight of water that moves is equal to the weight of the object on the water. Heavier objects displace more water. If the total weight of the object is greater than the water displaced by its volume, it is denser than water, and sinks.

Spaceship 1 and Spaceship 2 have equal masses of 200 kg They collide Spaceship 1's final speed is 2 ms and Spaceship 2's final speed is 1 ms in the same direction What is their combined momentum

2,000 kg-m/s "Apex"

In situations is mechanical energy conserved

It depends on the situation

What is nuclear energy if it is not nonrenewable and not a fossil fuel

It is nonrenewable!! Once we burn up all the Uranium we have no more.

Which of the following items does not use a wheel and axle (Apex)

a bicycle

Which of the following has the lowest density

air

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