Where does energy come from that fuels our physical activity

2 answers:

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.

You might be interested in

Why must one use a reference point to determine whether or not an object is in motion

GaryK [48]

Because there's no such thing as "really" moving.
ALL motion is always relative to something.

Here's an example:
You're sitting in a comfy cushy seat, reading a book and listening
to your .mp3 player, and you're getting drowsy. It's so warm and
comfortable, your eyes are getting so heavy, finally the book slips
out of your hand, falls into your lap, and you are fast asleep.

-- Relative to you, the book is not moving at all.
-- Relative to the seat, you are not moving at all.
-- Relative to the wall and the window, the seat is not moving at all.
-- But your seat is in a passenger airliner. Relative to people on the
    ground, you are moving past them at almost 500 miles per hour !
-- Relative to the center of the Earth, the people on the ground are moving
   in a circle at more than 700 miles per hour.
-- Relative to the center of the Sun, the Earth and everything on it are moving
   in a circle at about 66,700 miles per hour !

How fast are they REALLY moving ?
There's no such thing.
It all depends on what reference you're using.

7 0

3 years ago

The water-ice particles forming Saturn's rings are frozen together into a thin sheet that rotates around Saturn like a solid bod

vaieri [72.5K]

Answer:

B. False

Explanation:

According to research by several scientists, Saturn's rings aren't solid, as they appear from Earth. They are actually made up of floating chunks of water ice, rocks and dust that range in diferent sizes from specks to enormous, even house-sized pieces that orbit Saturn in a ring pattern.

4 0

2 years ago

If a person looking at a poster sees green instead of yellow and doesn't see red at all, this person most likely has color blind

katrin [286]

Red - sensitive so answer is c

7 0

2 years ago

Read 2 more answers

21. A fisherman catches two sturgeons. The smaller of the two has a measured length of 93.46 cm (two dec- imal places and four s

Leto [7]

Answer:

135.3 cm + 93.46cm

= 228.76 cm

So total length of two fish is 228.76

5 0

2 years ago

Please help

WITCHER [35]

Gravity is the force that pulls you down.
(This is kind of a duh! question ... How do we know
which way is "down" ? We feel gravity, and we call
that the "down" direction.)

Magnetic force holds things to fridge doors.

Contact forces need to touch something in order to
exert their force.
Example: Gravity is NOT a contact force.

I don't know about "rubbing things away".
This might be a description of friction, but if so,
it's not a good one.

Buoyant force is what keeps floating things floating.

Air resistance slows things down when they move in air.

4 0

3 years ago