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Oksanka [162]
3 years ago
14

How are the energy conversions of machines similar to the energy conversions in your body

Physics
1 answer:
sleet_krkn [62]3 years ago
6 0

Answer:

Explained below

Explanation:

When we eat food, our body gets chemical energy from it. Now, this chemical energy from the food is changed into some different energy forms that is useful to it. They include:

-Chemical to mechanical energy to aid in movement of muscles

- chemical to thermal energy to aid in regulating the body temperature.

- chemical to electrical energy to aid the brain in thinking.

Thus is similar to how a machine converts energy because machines also generate energy after being powered and convert to other forms of energy. For example, an alarm clock converts electrical energy to sound energy, hair dryer converts electrical energy to thermal/heat energy.

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A horizontal line on a velocity/time graph shows ____ acceleration.
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Answer:

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Explanation:

A horizontal line will be no movement of negative of positive acceleration

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A jet aircraft with mass of 658,055 kilograms is flying straight downward. At an instant the plane's engine is producing an down
sdas [7]

Answer:

The acceleration of the plane is 10.93 m/s² at that instant.

Explanation:

Given:

Mass of aircraft, m=658055\textrm{ kg}

Downward thrust produced, F=1484732.5\textrm{ N}

Upward resistance force by air, F_{R}=740492.6\textrm{ N}

Weight of the aircraft acting donward, W=mg=658055\times 9.8=6448939\textrm{ N}

According to Newton's second law, net force acting on an object is equal to the product of mass and its acceleration.

Here, the net force is given as the difference of downward forces and upward forces.

F_{net}= F+W-F_{R}\\ F_{net}=1484732.5+6448939-740492.6=7193178.9\textrm{ N}

Now,

F_{net}=ma\\7193178.9=658055a\\a=\frac{7193178.9}{658055}=10.93\textrm{ }m/s^{2}

Therefore, the acceleration of the plane is 10.93 m/s² at that instant.

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