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4 years ago

66 POINTS HELP PLS

2 answers:

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]4 years ago

6 0

Answer:

a b d b a c

Explanation:

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3 years ago

Read 2 more answers

A wave has angular velocity 12 rad/sec and maximum displacement X cm (X= last two digit [1] of your student’s ID). Calculate the

Naily [24]

Answer:

$a=1440\ m/s^2$

Explanation:

Given that,

The angular velocity of a wave, $\omega=12\ rad/s$

The maximum displacement of the wave, A = 10 cm (let)

The maximum acceleration of the wave is given by :

$a=-A\omega^2$

Put all the values,

$a=10\times 12^2\\\\a=1440\ m/s^2$

So, the maximum acceleration of the wave is equal to $1440\ m/s^2$ .

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3 years ago

A light, rigid rod is 55.8 cm long. Its top end is pivoted on a frictionless horizontal axle. The rod hangs straight down at res

VMariaS [17]

To solve this problem we will apply the principle of conservation of energy. For this purpose, potential energy is equivalent to kinetic energy, and this clearly depends on the position of the body. In turn, we also note that the height traveled is twice that of the rigid rod, therefore applying these concepts we will have

$KE = PE$

$\frac{1}{2} mv^2 = mgh$

$v = \sqrt{2gh}$

$v = \sqrt{2(9.8)(2(55.8*10^{-2}))}$

$v = 4.67m/s$

Therefore the minimum speed at the bottom is required to make the ball go over the top of the circle is 4.67m/s

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3 years ago

A tennis ball moves 18 meters northward, then 22 meters

Vlad [161]

Answer:

The distance moved is 82 m.

The displacement is 18 m to the south.

Explanation:

The distance is a measure of the total length traveled along the path, while the displacement only takes into account the length between the starting position (departure) and final position (arrival). That is, distance refers to how much space an object travels during its movement, being the amount moved, while displacement refers to the distance and direction of the final position with respect to the initial position of an object.

So, the distance being the sum of the distances traveled, you get:

18 m + 22 m + 14 m + 28 m= 82 m

The distance moved is 82 m.

You know that the tennis ball moves 18 meters to the north, then 22 meters to the south, then 14 meters to the north, and finally 28 meters to the south. Then the tennis ball moves:

northward: 18 m + 14 m= 32 m
to the south: 22 m + 28 m= 50 m

Calculating the displacement as the difference between the final position and the initial position, you get:

displacement= 50 m - 32 m= 18 m

The displacement is 18 m to the south.

8 0

3 years ago

When light of wavelength λ illuminates the surface of Metal 1, the stopping voltage is V. In terms of V, what will be the stoppi

castortr0y [4]

Answer:

(D) V + 1.5 volts

Explanation:

Eq. for stopping potential:

eV₀ = hf - ∅ ---- eq (1)

where

V₀ = stopping potential

h = planks's constant

v = frequency of light

f = c/λ

∅ = work function

stopping potential for metal 1 =V₁= V

stopping potential for metal 1 = V₂

work function for metal 1 = 3.6 eVolts

work function for metal 2 = 2.1 eVolts

substituting values for metal 1 in eq (1)

eV₁ = hf - ∅₁

eV = hc/λ - 3.6 eVolts

V = hc/eλ - 3.6 Volts

hc/eλ = V + 3.6 Volts ----- eq(2)

Metal 2 is illuminated with same wavelength so stopping potential V₂ is:

eV₂ = hf - ∅₂

eV₂ = hc/λ - 2.1 eVolts

V₂ = hc/eλ - 2.1 Volts ---- eq(3)

substituting eq(2) in eq(3)

V₂ = V + 3.6 Volts - 2.1 Volts

V₂ = V + 1.5 Volts

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3 years ago