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aalyn [17]
3 years ago
12

Give two reasons why hydroelectricity could be better alternative of biofuel in the context of our country.​

Physics
1 answer:
Semmy [17]3 years ago
3 0

Answer:

Hydroelectricity is a renewable energy source.

Hydroelectricity increases the stability and reliability of electricity system

Hydroelectricity helps fight climate changes.

Explanation:

If we use hydroelectricity our country would be in good climate and not a bad one. And the best facts it is renewable.

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Khalil is driving laps at a racetrack. The track is circular and has a radius of 25 m. After
zysi [14]

The difference between the distance and the displacement is the speed is a scalar while displacement is a vector.

<h3>What is the distance an the displacement?</h3>

The distance is the difference between two points while the displacement is the difference between two points in a specified direction. Given that speed is a scalar and the displacement is a vector. It follows that we must take the displacement when obtaining the displacement.

Thus, the distance that is covered after one lap is  the circumference of the circle = 2πr = 2 * 3.142 * 25 = 31 m Then for 2 laps = 62 m

The displacement is obtained when we take the direction into consideration. Owing to the fact that the runner returns to the starting point each time, the displacement is zero.

Learn more about displacement:brainly.com/question/11934397

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7 0
2 years ago
A sample contains 16 g of a radioactive isotope. how much radioactive
mafiozo [28]

After one half-life, 8 g of radioactive isotope will remain in the sample.

<h3>What is radioactivity?</h3>

The act of producing radiation spontaneously is known as radioactivity. This is accomplished by an unstable atomic nucleus that want to give up some energy in order to move to a more stable form.

The following formula is used to compute the number of half lives elapsed:

\rm N=\frac{N_0}{2^n} \\\\ N=\frac{16}{2} \\\\ N= 8 \ gram

Hence,8 gram of radioactive isotope remains in the sample after 1 half-life.

To learn more about the radioactivity, refer  to the link;

brainly.com/question/1770619

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7 0
2 years ago
Read 2 more answers
A force is a vector that has both
choli [55]
Force Is A Vector That Has Both - Magnitude And Direction !

7 0
3 years ago
A particle (m = 3.8 × 10-28 kg) starting from rest, experiences an acceleration of 2.4 × 107 m/s2 for 5.0 s. What is its de Brog
Mazyrski [523]

Answer: The De broglie's wavelength is 1.45×10^-14m

Explanation:

Using De broglie's equation

λ= h/mv

Where h= Planck's constant = 6.6×10^-34Js

m= mass in kilogram = 3.8×10^-28kg

V= velocity = acceleration ×time =

2.4×10^7 ×5

V= 1.2×10^8m/s

λ= is the De broglie's wavelength

λ= 6.6×10^-34Js /(3.8×10^-28kg ×1.2×10^8)

λ= 1.45×10^-14m

Therefore ,De broglie's wavelength=

1.45×10^-14m

4 0
4 years ago
A hiker walks 4.30 km east, turns 90.0º due south and walks an additional 2.48 km. What distance did the hiker travel? *
Rainbow [258]

Answer:

6.78 km

Explanation:

Length of path due east  = 4.3km

Length of path south = 2.48km

Unknown:

Distance covered = ?

Solution:

The distance covered is the total length of path from start to finish. It takes cognizance of the turns and every direction moved.

Unlike displacement which only considers the net direction from start to finish, distance sums up the total path.

 So;

   Distance  = 4.3km + 2.48km = 6.78km

6 0
4 years ago
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