1. Brainstorm some design ideas. How can you strengthen 1 piece of aluminum foil? 2. Fill the plastic container with water ¾ full.
3. Use your piece of aluminum foil to design and build your ship.
4. Estimate on the data table how many pennies you think your design will hold.
5. Place your ship in the water filled tub and watch it float.
6. Now add one penny to the ship at a time until the ship starts to sink. When the ship starts to take on water, STOP! Remember to count your pennies as you add them.
7. Record this number on your data table.
8. Rethink your design. How could you make your ship stronger?
9. Clean up any spilled water and wipe down your work area.

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Explanation:

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the right is separation by density .

take the blood which is a good example of a heterogeneous mixture.

blood is a vital liquid in our body, which transports oxygen from the air to our lungs so we can breathe. it is also used to eject wastes, such as carbon dioxide, to bring cells and molecules of the immune system to the tissues, and to spread hormones throughout the body. it corresponds to plasma, red blood cells, white blood cells, platelets and hemoglobins combined.

in medical tests centrifugal force is used to separate the different components of the blood.

in general, the centrifugation will allow to separate and analyze the different components of the blood, to know if the rate of white blood cells in the blood of a patient, for example, is normal, and therefore to know if his system immune is integrity.

under the action of centrifugal force, the solid components in the blood are drawn to the bottom of the tube in which the blood is contained. the centrifugal force then acts as an accelerated settling. it separates plasma from red blood cells and white blood cells.