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DIA [1.3K]
3 years ago
15

Where does energy come from that fuels our physical activity

Physics
2 answers:
Lelechka [254]3 years ago
8 0

The energy that fuels the processes inside our bodies and everything we do with our bodies comes from chemical energy stored in what we eat.

But that only raises another question:  Where does the chemical energy in our food come from ?

If you follow it back far enough, eventually it ALL comes from the sun.

joja [24]3 years ago
7 0

Energy comes from the Sun, plants and animals that we eat, to provide us with nutrients we need for energy.


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What time does the full moon rise? A. About Sunrise B. About Noon C. About Sunset D. About Midnight
Lisa [10]

Answer:

The correct option is: c) Sunset

Explanation:

Moon is the permanent natural satellite of the Earth. It orbits around our planet Earth and shows synchronous rotation.  

When Earth is present between the Moon and Sun, the moon appears to be fully illuminated from the Earth, this is called the full moon. <u>All full moons rise about the same time as the sunset.</u>

8 0
3 years ago
Read 2 more answers
Two metal disks are welded together and are mounted on a frictionless axis through their common centers. One disk has a radius R
Airida [17]

The Inertia is 22. 488 kg. m² and the speed just before it hits the ground is 6. 4 m/s

<h3>How to determine the inertia</h3>

Using the formula:

I = 1/2 M₁R₁² + 1/2 M₂R₂²

Where I = Inertia

I = 1/2 * 0.810* (2. 60)² + 1/2 * 1. 58 * (5)²

I = 1/2 * 5. 476 + 1/2 * 39. 5

I = 2. 738 + 19. 75

I = 22. 488 kg. m²

To determine the block's speed, use the formula

v = \sqrt{2gh}

v = \sqrt{2* 10 * 2. 10}

v = \sqrt{42}

v = 6. 4 m/s

Therefore, the Inertia is 22. 488 kg. m² and the speed just before it hits the ground is 6. 4 m/s

Learn more about law of inertia here:

brainly.com/question/10454047

#SPJ1

7 0
2 years ago
Help with these questions
erma4kov [3.2K]
<h2>Explanation:</h2><h3>3. </h3>

When light bounces back, it is <em>reflected</em>. (That's why you see your <em>reflection</em> in a mirror.) When light is bent from the path it is taking, it is <em>refracted</em>. The only answer choice that makes correct use of these terms is the third choice:

  • Part of the ray is <em>refracted</em> into ray B; part of the ray is <em>reflected</em> as ray R.

_____

<h3>4.</h3>

The index of refraction is the ratio of the sine of the angle of incidence to the sine of the angle of refraction. Both angles are measured from the normal to the surface. The angle of refraction here is 12.5° less than the angle of incidence, 44°, so is 31.5°. Then the index of refraction of the medium is ...

  n = sin(44°)/sin(31.5°) = 0.69466/0.52250 = 1.3299 ≈ 1.33

  • none of the offered choices is correct. The closest is 1.34.
8 0
3 years ago
How is sound wave produced?​
kramer

Answer:

Sound is produced when an object vibrates, creating a pressure wave.

Explanation:

This pressure wave causes particles in the surrounding medium (air, water, or solid) to have vibrational motion. ... The human ear detects sound waves when vibrating air particles vibrate small parts within the ear.

3 0
3 years ago
Read 2 more answers
Suppose you want to test the hypothesis that plants grow taller when they receive more sunlight. Identify and independent variab
ollegr [7]
The result that should be established is in the form
y = f(x) 
where x, the amount of sunlight is the controlled (independent) variable,
y =  height (growth) that corresponds to the amount of sunlight. Therefore y depends on x.

Clearly,
x, the amount of sunlight is the independent variable. It can be controlled.
y, the measured amount of growth is the dependent variable.

Answer:
The independent variable is the amount of sunlight.
The dependent variable is the growth.
5 0
3 years ago
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