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3 years ago

Plz help!!!!!!!! will mark as brainliest!!!!!!

Physics

1 answer:

Ilya [14]3 years ago

5 0

My best guess would be letter C for this one

hope this helps

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What is the original source of hydroelectric energy

tangare [24]

Differences in land elevation result in rainfall runoff, and allow some of the original solar energy to be captured as hydro-electric power (Figure 1). Hydro power is currently the world's largest renewable source of electricity, accounting for 6% of worldwide energy supply or about 15% of the world's electricity.

hope this helps

mark brainliest :)

6 0

3 years ago

who developed the quantum theory? who is remembered as the father of nuclear science? who developed the theories of relativity?

DerKrebs [107]

Answer:

1.Albert Einstein is considered as the one who developed the quantum theory. Although Planck gives the idea of quantized energy but Einstein gives the theory that not only the energy the wave or radiation itself is quantized.

2. Earnest Rutherford is considered as the father of nuclear science as he gives the concept of half life and perform tests of alpha and beta radiations in various elements.

3. Again Albert Einstein was the one who gave the theory of relativity in 1905.

Explanation:

7 0

3 years ago

Oceans and lakes are part of the?

astraxan [27]

Oceans and Lakes are part of the Hydrosphere.

8 0

4 years ago

Read 2 more answers

Calculate the force required to accelerate a 600 g ball from rest to 14 m/s in 0.1 s.

Evgen [1.6K]

Statement:

A force is required to accelerate a 600 g ball from rest to 14 m/s in 0.1 s.

To find out:

The force required to accelerate the ball.

Solution:

Mass of the ball (m) = 600 g = 0.6 Kg
Initial velocity (u) = 0 m/s [it was at rest]
Final velocity (v) = 14 m/s
Time (t) = 0.1 s

Let the acceleration be a.
We know the equation of motion,
v = u + at

Therefore, putting the values in the above formula, we get
14 m/s = 0 m/s + a × 0.1 s
or, 14 m/s ÷ 0.1 s = a
or, a = 140 m/s²

Let the force be F.
We know, the formula : F = ma

Putting the values in the above formula, we get
F = 0.6 Kg × 140 m/s²
or, F = 84 N

Answer:

The force required to accelerate the ball is 84 N and this force acts along the direction of motion.

Hope you could understand.

If you have any query, feel free to ask.

5 0

2 years ago

Two submarines are underwater and approaching each other head-on. Sub A has a speed of 15.8 m/s and sub B has a speed of 8.63 m/

Evgen [1.6K]

Answer:

a) The frequency detected by the submarine B, f' = 1595 Hz

b) The frequency of the reflected wave detected by the A is, f'' = 6021 Hz

Explanation:

Given data,

The speed of submarine A, v = 15.8 m/s

The speed of submarine B, v' = 8.63 m/s

The SONAR wave travels at a speed of V = 1522 m/s

The formula for Doppler effect is,

$f' = \frac{V+v'}{V-v} f$

Substituting the given values above,

$f' = \frac{1522+8.63}{1522-15.8} 1570$

f' = 1595 Hz

The reflected SONAR has the frequency of, f' = 1595 Hz

Therefore, the frequency of the reflected wave at A is given by the formula,

$f'' = \frac{V+v}{V-v'} f'$

$f'' = \frac{1522+15.8}{1522-8.63} 1595$

f'' = 6021 Hz

Hence, the reflected wave has the frequency of f'' = 6021 Hz

8 0

3 years ago