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3 years ago

Which type of energy is the original source for the energy that food molecules can provide?

Physics

1 answer:

Svet_ta [14]3 years ago

4 0

Answer:

Chemical potential energy

Explanation:

which is used to for any form of energy.

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Magnets are not hammered or rubbed<br> why?

Nutka1998 [239]

Lose its magnetic properties

8 0

2 years ago

Noah is loading the ark and the last animal on board is a stubborn 1500-kg elephant who refuses to budge. Noah and his family pu

Oxana [17]

The coefficient of sliding friction is 0.514

Explanation:

We start by writing the equations of motion of the elephant along the two directions, parallel and perpendicular, to the incline.

Along the parallel direction we have:

$F- mg sin \theta - \mu_k R = ma$ (1)

where :

F = 10,000 N is the force applied by Noah

$mg sin \theta$ is the component of the weight parallel to the incline, where:

m is the mass

g = 9.8 m/s^2 the acceleration of gravity

$\theta=10^{\circ}$ is the angle of incline

$\mu_k R$ is the force of friction, where:

$\mu_k$ is the coefficient of friction

R is the normal reaction

and a is the acceleration

Perpendicular direction:

$R-mg cos \theta =0$ (2)

where $mg cos \theta$ is the component of the weight perpendicular to the incline

From (2) we find

$R=mg cos \theta$

And substituting into (1)

$F-mg sin \theta - \mu_k mg cos \theta = ma$

We know that the elephant moves at constant speed, so the acceleration is zero:

a = 0

So the equation becomes

$F-mg sin \theta - \mu_k mg cos \theta=0$

And we can re-arrange it to find the coefficient of friction:

$F-mg sin \theta - \mu_k mg cos \theta=0\\\mu_k = \frac{F-m g sin \theta}{mg cos \theta}=\frac{10000-(1500)(9.8)(sin 10)}{(1500)(9.8)(cos 10)}=0.514$

Learn more about friction and inclined planes:

brainly.com/question/5884009

#LearnwithBrainly

4 0

3 years ago

Một con lắc lò xo dao động điều hoà theo phương thẳng đứng, trong quá trình dao động của vật lò xo có chiều dài biến thiên từ 20

san4es73 [151]

Answer:

6738eyuieouhdgcycyeiojhyrvvbbgdgdiokfjbdbhhdhdhcjviriwdhycyfjfkkdofjrjfufjjrhrhfuvuvirie884727eugig8gjfhenekwkekfjvubkdjejdn

Explanation:

buang ka

6 0

3 years ago

Why is it important that we learn about our solar system, the sun, and planets in our solar system other than Earth?

tangare [24]

Answer:

To understand all the different kind of elements and how they work. Nature is a beautiful thing and it is important we understand how they survive and how we can help. The solar system is a mandatory nature. Learning about other planets also helps us feel safe and more knowledgable.

8 0

3 years ago

Neon signs require about 12,000 V for their operation. Consider a neon-sign transformer that operates off 120- V lines. How many

Ugo [173]

I can't give you the actual number of turns, because it's the RATIO
that counts.

However many turns the primary has, the secondary should have
about TEN TIMES that number. Then the transformer will multiply
the primary voltage by 10 ... 120 volts of AC at the primary will
become 1,200 volts of AC at the secondary.

Note that it HAS TO be AC. If the transformer is supplied with DC,
then 120 volts at the primary becomes zero volts at the secondary
and a big cloud of stinky smoke in the room.

8 0

3 years ago