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Anastasy [175]
3 years ago
15

Why is the sun considerad as the main source of energy?​

Physics
2 answers:
Marianna [84]3 years ago
7 0

Answer:

It is because it supplies most of our energy that we use today, directly or indirectly. It radiates light and heat or solar energy, which makes it possible to exist life on earth.

KATRIN_1 [288]3 years ago
3 0

Answer:

The sun is considered as the main source of energy since it is the source of nearly all the earth's energy. Plants produce food using sunlight, and the food we get from plants and animals also has its primary sunlight source.

Hoped it helps you.

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What type of evidence suggests that the North America and Africa used to be next to each other
melisa1 [442]
If you try to fit the edges of both continents than they should somewhat fit each other like puzzle pieces
4 0
3 years ago
A ship maneuvers to within 2.46×10³ m of an island’s 1.80 × 10³ m high mountain peak and fires a projectile at an enemy ship 6.1
Nesterboy [21]

Answer:

The distance close to the peak is 597.4 m.

Explanation:

Given that,

Distance of the first ship from the mountain d=2.46\times10^{3}\ m

Height of islandh=1.80\times10^{3}\ m

Distance of the enemy ship from the mountain d'=6.10\times10^{2}\ m

Initial velocity v=2.55\times10^{2}\ m/s

Angle = 74.9°

We need to calculate the horizontal component of initial velocity

Using formula of horizontal component

v_{x}=v\cos\theta

Put the value into the formula

v_{x}=2.55\times10^{2}\cos74.9

v_{x}=66.42\ m/s

We need to calculate the vertical component of initial velocity

Using formula of vertical component

v_{y}=v\sin\theta

Put the value into the formula

v_{y}=2.55\times10^{2}\sin74.9

v_{y}=246.19\ m/s

We need to calculate the time

Using formula of time

t=\dfrac{d}{v_{x}}

t=\dfrac{2.46\times10^{3}}{66.42}

t=37.03\ sec

We need to calculate the height of the shell on reaching the mountain

Using equation of motion

H= v_{y}t-\dfrac{1}{2}gt^2

Put the value in the equation

H=246.19\times37.03-\dfrac{1}{2}\times9.8\times(37.03)^2

H=2397.4\ m

We need to calculate the distance close to the peak

Using formula of distance

H'=H-h

Put the value into the formula

H'=2397.4-1800

H'=597.4\ m

Hence, The distance close to the peak is 597.4 m.

6 0
3 years ago
Which of the following are results of the force of gravity?
docker41 [41]
Hello,

Here is your answer:

The proper answer for this question is option B "When released,a book falls to the ground". That's because of gravity the book will hit the ground!

Your answer is B.

If you need anymore help feel free to ask me!

Hope this helps.
7 0
3 years ago
Read 2 more answers
A block with a mass of 8.7 kg is dropped from rest from a height of 8.7 m, and remains at rest after hitting the ground. 1)If we
Harlamova29_29 [7]

To solve this problem we will apply the concepts related to gravitational potential energy.

This can be defined as the product between mass, gravity and body height.

Mathematically it can be expressed as

\Delta P = mgh

\Delta P = (8.7)(9.8)(3)

\Delta P = 255.78J

Therefore the change in the internal energy of the system is 255.78

7 0
3 years ago
The root-mean-square value of an alternating current of S0Hz frequency is 10 ampere. The time taken by the alternating current i
stealth61 [152]

Answer:

(D ) 5\times10^{-3} sec and 14.14 amp.

Explanation:

Given that, the rms value of current is 10 ampere and its frequency is 50 Hz.

Now maximum value of current can be calculated as,

I_{max}=\sqrt{2}I_{rms}\\I_{max}=10\times \sqrt{2}  \\I_{max}=14.14 amp.

The time period is defined as,

T=\frac{1}{f}\\ T=\frac{1}{50}\\ T=0.02 sec

Now the time taken by alternating current going from zero to maximum value is,

t=\frac{T}{4}\\ t=\frac{0.02}{4}\\ t=5\times 10^{-3}sec

Therefore, the time taken by alternating current to reach maximum value is t=5\times 10^{-3}sec and the peak value of current is 14.14 amp..

7 0
3 years ago
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