Describe by using the atomic model as an example, the usefulness of models in science.

1 answer:

7 0

Models help in the visualization and understanding of a phenomenon. For example, the atomic model helped scientists understand the arrangement of protons, neutrons and electrons in the atom long before it could be observed and this helped them relate the structure to its effects.

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Technician A says that disc brakes are self adjusting and the brake pedal height should not become lower as the disc brake pads

maks197457 [2]

Answer:

c. Both Technicians A and B

Explanation:

Disc brakes are self-adjusting because the pistons in the brakes are much larger in diameter than the ones in the master cylinder. If the brake pistons retracted into their cylinders, it might take several applications of the brake pedal to pump enough fluid into the brake cylinder to engage the brake pads. The height of the brake pedal is also necessary because if they become lower the disc brake pads will wear, this is why self-adjustment is important and disc brake pads usually have a piece of metal on them called a wear indicator to warn of wearing. Also when disc break pads wear, the fluid level in the master cylinder drops, armed with this knowledge of low master cylinder fluid level one can inspect the disc pads for wear. Thus both Technicians A and B are correct.

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gulaghasi [49]

Answer:

Explanation:

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A roller coaster at an amusement park girls from the top of a tall hill to the bottom during this time of the roller coaster

Mrac [35]

D), because the roller coaster it's falling, therefore, losing height, but gaining velocity