3 years ago

Question 9 of 20

1 answer:

5 0

B, we can use a power drill for an example, the motars are used by electricity (electrical energy) and used to screw in wood (mechanical energy)

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Question 10 of 20 Which statement describes an example of static electricity? O A. Electric charges move from a position of high

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Answer:

C. A person rubs a shoe on a rug, causing extra electrons to be transferred to the shoe

Explanation:

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Anybody know the answer?

Klio2033 [76]

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3 years ago

How can you calculate the number of electrons in an atom

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Convert 1 atom into 10 electrons (I think)

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4 years ago

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One person drives 60,000 miles in a car that averages 30 miles per gallon (mpg), while another person drives 60,000 miles in a c

Solnce55 [7]

Answer:

20000 pounds

Explanation:

Generally 1 gallon of fuel burnt gives of 20 pounds of CO₂

Difference in the gallons of fuel burnt

$\dfrac{60000}{20}-\dfrac{60000}{30}=1000\ gal$

The 20 mpg car burns 1000 gallons of fuel more than the 30 mpg car

The amount of CO₂ would be

$1000\times 20=20000\ pounds$

The fewer pounds that the 30 mpg car would release is 20000 pounds

4 0

3 years ago

falling objects drop with an average acceleration of 9.8m/sec/sec. if an object falls from a tall building how long will it take

sveta [45]

Answer:

5 seconds

Explanation:

Acceleration = (final velocity - initial velocity) ÷ time

$a = \frac{v - u}{t}$

$9.8 = \frac{49 - 0}{t}$

$9.8 = \frac{49}{t}$

$9.8t = 49$

$t = \frac{49}{9.8}$

$t = 5$

8 0

3 years ago