Which of the following is an example of velocity?

Physics

1 answer:

saveliy_v [14]3 years ago

8 0

Answer:

Explanation:

b is 55 miles per hour south or 55mph[South]

the important part to understand is that velocity is a vector meaning it also has to have a direction, in this case south. That is why a (2m/s) is not a velocity, however 2m/s is a speed.

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A current of 2.0A flows through a light bulb. What is the amount of charge flowing through the light bulb in 40 seconds?

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Answer:

Quantity of charge = 80 Coulombs

Explanation:

Given the following data;

Current = 2 A

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To find the amount of charge flowing through the light bulb;

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Quantity of charge = current * time

Substituting into the formula, we have;

Quantity of charge = 2 * 40

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A potato and raisins salad has been warmed up to a temperature of 80∘C80∘C and let it stand for three minutes. Then one tries a

barxatty [35]

Answer : The correct option is, (a) No. Potatoes will be warmer.

Explanation :

Formula used :

$Q=m\times c\times \Delta T$

where,

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c = specific heat of substance = ?

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As we are given that the potatoes have a specific heat of $3430J/(kg^oC)$ and raisins have a specific heat of $1630J/(kg^oC)$ . That means higher the value of specific heat the more heat taken by the substance (more warmer will be the substance). So, the potatoes will be more warmer as compared to raisins.