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maxonik [38]
3 years ago
6

66 POINTS HELP PLS

Physics
2 answers:
jasenka [17]3 years ago
7 0
QUESTION 1 -

Which of the following best describes the use of a renewable resource? (2 points)

ANSWER:

C. There are areas in California that use the heat from deep in the Earth to generate electricity.

The answer is Option C as it is the only option which refers to a renewable energy resource. The renewable source which it refers to is geothermal energy as it is heat obtained from deep within the Earth which is utilised to produce electricity. Therefore, Option C is the answer.

QUESTION 2 -

Which of the following best describes the use of a non-renewable resource? (2 points)

ANSWER:

C. Natural gas is a great alternative to electricity for cooking.

The answer is Option C as it is the only option which refers to a non-renewable energy resource. Natural gas is a non-renewable resource as it was formed from the buried remains of plants and animals who were alive a significantly long time ago, thus making them fossil fuels. As all fossil fuels are non-renewable, natural gas must be a non-renewable resource. Therefore, Option C is the answer.

QUESTION 3 -

Which of the following best describes the use of a renewable resource? (2 points)

ANSWER:

D. Solar panels are able to gather the energy from the sun and convert it into electrical energy.

The answer is Option D as it is the only option which refers to a renewable energy resource. The renewable resource it refers to is solar energy as solar panels are utilised in order to produce solar energy for electricity. Solar energy is renewable as it utilises the sun's energy in the form of heat and light energy. As the sun's energy is unlimited and renewable resources are meant to be unlimited, solar energy must be a renewable energy resource. Therefore, the answer must be Option D.

QUESTION 4 -

Select the example that best describes a renewable resource. (2 points)

ANSWER:

B. My town is powered by electricity that is generated by the energy from the flow of water through a large dam.

The answer is Option B as it is the only option which refers to a renewable energy resource. The renewable resource it refers to is hydroelectricity also known as hydropower as it utilises energy from the flow of water in a large controlled dam. Hydropower is renewable as it utilises energy from the flow if water which is an unlimited resource. As hydropower is unlimited and renewable energy is meant to be unlimited, hydropower must be a renewable resource. Therefore, the answer must be Option B.

QUESTION 5 -

Which example describes a non-renewable resource? (2 points)

ANSWER:

D. There are drilling platforms all along the coast that are used to drill for natural gas that can be used to generate electricity.

The answer is Option D as it is the only option which refers to a non-renewable energy resource. Natural gas is a non-renewable resource as it was formed from the buried remains of plants and animals who were alive a significantly long time ago, thus making them fossil fuels. As all fossil fuels are non-renewable, natural gas must be a non-renewable resource. Therefore, Option D is the answer.

Hope this helps! :)
Have a lovely day! <3
kozerog [31]3 years ago
6 0

Answer:

a b d b a c

Explanation:

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40 POINTS
prohojiy [21]

Answer:

C

Explanation:

this is because i need more space

7 0
2 years ago
Read 2 more answers
A sample of radium-226 will decay to ¼ of its original amount after 3200 years. What is the half-life of radium-226?
lesantik [10]
<h3><u>Answer</u>;</h3>

1600 years

<h3><u>Explanation</u>;</h3>
  • Half life is the time taken for a radioactive isotope to decay by half of its original amount.
  • We can use the formula; N = O × (1/2)^n ; where N is the new mass, O is the original amount and n is the number of half lives.
  • A sample of radium-226 takes 3200 years to decay to 1/4 of its original amount.

Therefore;

<em>1/4 = 1 × (1/2)^n</em>

<em>1/4 = (1/2)^n </em>

<em>n = 2 </em>

Thus; <em>3200 years is equivalent to 2 half lives.</em>

<em>Hence, the half life of radium-226 is 1600 years</em>

3 0
3 years ago
An object has an acceleration of 6.0 m/s/s. If the net force was doubled and the mass was one-third the original value, then the
alexandr402 [8]

Hahahahaha. Okay.

So basically , force is equal to mass into acceleration.

F=ma

so when F=ma , we get acceleration=6m/s/s

Force is doubled.

Mass is 1/3 times original.

2F=1/3ma

Now , we rearrange , and we get 6F=ma

So , now for 6 times the original force , we get 6 times the initial acceleration.

So new acceleration = 6*6= 36m/s/s

5 0
3 years ago
What is the only thing that can change
krok68 [10]

Answer:

Since velocity is a speed and a direction, there are only two ways for you to accelerate

Explanation:

change your speed or change your direction—or change both.

8 0
2 years ago
Read 2 more answers
Which of the following statement is not true about machines?
viva [34]
The answer to this question is D or the last one 

4 0
3 years ago
Read 2 more answers
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