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yaroslaw [1]
4 years ago
6

A town is considering building a biodiesel power plant that would burn biomass to generate electricity. Which of the following c

orrectly lists an advantage and a disadvantage of this project?
A) Advantage: it could help get rid of unwanted waste. Disadvantage: there is no way to use the electricity created.
B) Advantage: it reduces dependence on fossil fuels. Disadvantage: it would emit pollution into the air.

C) Advantage: it is a commonly used energy source. Disadvantage: building the plant would attract new people to the area.

D) Advantage: it would use energy from the sun and wind. Disadvantage: it is a non-renewable source of energy.
Physics
1 answer:
zmey [24]4 years ago
3 0

Answer: it reduces dependence on fossil fuels. Disadvantage: it would emit pollution into the air.

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Which type of electromagnetic wave is invisible, but close to visible light, with wavelengths about the size of a virus or a lar
DochEvi [55]
<span>The correct answer is option B. i.e UV Rays. The Ultra violet light is the part of electromagnetic light whose wavelength is less than the Visible light light. i.e. UV range is from 10 nm to 400 nm. UV light is invisible to the naked eye.</span>
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3 years ago
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A migrating bird flew across a lake at an average speed of 18 meters per second. Was the distance that the bird flew across the
Natasha_Volkova [10]

Answer:

It cannot be said with 100% guarantee.

Explanation:

Since bird is travelling with 18 meters per second, that means that it covers a distance of 18 meters in 1 second.

for part 1 we convert 20 minutes into seconds, thus, 20 * 60 = 1200 seconds.

Distance covered in 1200 seconds will be:

S = v * t (S is distance , v is speed, t is time)

18 * 1200 = 21600 meters = 21.6 Kilometers

If the bird took less than 20 minutes than distance covered would be less than 21.6 Kilometer which could be greater than or lesser than 21 Kilometers. On average we can say that the distance bird travelled will be less than 21 Kilometer. But it is not definite.

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0.4 * 60 * 60 = 1440 seconds

Distance covered will be

18 * 1440 = 25920 meters = 25.9 Kilo meters.

Again, if the bird takes less than 0.4 hours to cover the lake, the lake will be less than 25.9 kilometers long. This means that it could be greater than or lesser than 21 kilometers. It cannot be definitive

7 0
4 years ago
A 1250kg car driving 1200km to Florida in 19.5 hours gets a speeding ticket for traveling 120km/h in Turbeville South Carolina.
IRINA_888 [86]

Answer:

v = 61.54 km/h

Explanation:

The average speed of the car can be found by using the total distance covered by the car and the total time taken for that distance to be traveled. Therefore, the average speed of the car can be found by the following formula:

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t = time taken for the traveling = 19.5 hr

Therefore,

v = \frac{1200\ km}{19.5\ hr}\\\\

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3 0
3 years ago
Where does the FIRST car on a roller coaster have its greatest potential energy? Its greatest kinetic energy?
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Answer:

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