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Elis [28]
3 years ago
11

Why is it important to develop alternative energy sources

Physics
1 answer:
Aliun [14]3 years ago
7 0

Answer:

The alternative energy sources are defined as those resources that are used in place of the natural and non-renewable resources. This resources plays an important role in the conservation of natural resources.

The fossil fuels are the resources on which the people are directly dependent. Burning up of these fossils leads to the emission of carbon, which has a direct impact on earth. A small increase in the amount of carbon dioxide can lead to the increase in the surface temperature of earth.

In addition to this, these fossil fuels such as coal, petroleum, oil and natural gases are found to be present in a limited proportion, and it is a very expensive process to obtain these resources, so sustainable development method must be adopted in order to save this natural resources for the future generation.

Some of the examples of alternative resources that are widely used in place of fossil fuels are wind energy, solar energy, tidal energy, biomass energy and bio-fuels.

Thus, it is very important to develop and use alternative resources.

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3 years ago
What is the maximum speed with which a 1200-kg car can round a turn of radius 88.0 m on a flat road if the coefficient of static
boyakko [2]

Answer:

18.6 m/s

Explanation:

The frictional force acting on the car is given by:

F_f = \mu m g=(0.40 )(1200 kg)(9.81 m/s^2)=4709 N

But the frictional force also corresponds to the centripetal force that keeps the car in circular motion in the turn:

F_f = F_c = m \frac{v^2}{r}

Where v is the maximum speed the car can achieve remaining in the turn. Substituting r=88.0 m and re-arranging the formula, we can find the value of v:

v=\sqrt{\frac{Fr}{m}}=\sqrt{\frac{(4709 N)(88.0 m)}{1200 kg}}=18.6 m/s

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