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Effectus [21]
3 years ago
10

Which transformation of energy occurs in a hydroelectric power plant? A. Potential to chemical energy B. Chemical to potential e

nergy C. Chemical energy to kinetic energy D. Kinetic to electrical E. Electrical to potential energy
Physics
2 answers:
motikmotik3 years ago
7 0

The correct answer to the question is D). Kinetic to electrical.

EXPLANATION:

Hydro electric power plants are the electricity generation plants which capture the energy of falling water to produce current.

The water present at the top of a dam has potential energy. When the water is allowed to fall from certain height, the potential energy of the water is converted into kinetic energy.

The falling water moving with high speed is allowed to fall on a turbine. The kinetic energy of the water will rotate the turbine. The turbine is attached to a generator which will produce electricity due to the electromagnetic induction.

Hence, we see that the kinetic energy of the water is converted into electric energy.

natita [175]3 years ago
6 0
D. kinetic energy to electrical energy
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Which are characteristics of refraction
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Answer:

When light travels from one medium to another, the frequency of light does not change. However, the velocity and wavelength change.

Explanation:

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4 0
3 years ago
A ball is projected upward at time t = 0.0 s, from a point on a roof 70 m above the ground. The ball rises, then falls and strik
pentagon [3]

Answer:

The velocity of a ball will be "-70.13 m/s".

Explanation:

The given values are:

u = 70 m

t = 0.0 s

g = a = -9.8 m/s²

s = -1 m

v = ?

As we know,

The equation of motion will be:

⇒  v^2-u^2=2as

On substituting the estimated values, we get

⇒  v^2-(70)^2=2\times (-9.8)\times (-1)

⇒  v^2-4900=19.6

⇒  v^2=19.6+4900

⇒  v^2=4919.6

⇒  v=\sqrt{4919.6}

⇒  v=70.13 \ m/s

In downward direction, it will be:

⇒  v=-70.13 \ m/s

8 0
3 years ago
List the levels of classification in order from most broad (largest number of organisms) to most specific (smallest number of or
Tju [1.3M]
Every organism may classified into seven level of classifications, such that each level contains organisms with similar characteristics. Kingdom is the largest and the broadest level of classification while species is the smallest and most specific level of classification. Therefore from the largest to the smallest the order is as follows:
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3 0
4 years ago
Read 2 more answers
How is energy involved in physical changes and in chemical changes?
GaryK [48]

During phase changes, energy changes are usually involved. For example, when solid dry ice vaporizes (physical change), carbon dioxide molecules absorb energy. Meanwhile, when liquid water becomes ice energy is released.

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4 0
3 years ago
If the sine of an angle is 4/7 what is the cosine of its complement.
kap26 [50]

Answer: 0.57

Explanation:

Let's begin by explaining that two angles are complementary when they sum is 90\°:

\theta + \alpha=90\°

Having this clear, let's find \theta from the following trigonometric function:

sin \theta=\frac{4}{7}

\theta=sin^{-1} (\frac{4}{7})=34.84 \°

Now that we have the value of \theta, let's find \alpha:

\alpha=90\°-\theta

\alpha=90\°-34.84 \°

\alpha=55.15\° This is the complement of angle \theta

Then, the cosine of the complement \alpha is:

cos \alpha=cos(55.15\°)

cos \alpha=0.57 This is the answer

7 0
3 years ago
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