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Stells [14]
4 years ago
11

Identify two different objects that transform chemical energy into mechanical energy, and chose one object in the room and descr

ibe the energy transformation that occurs.
Physics
2 answers:
IgorLugansk [536]4 years ago
8 0

Answer:

~Shooting off fireworks, igniting that bottle rocket converts the fuel inside into an exhaust gas which propels the rocket.

~Automobiles, trains, planes all have combustion engines.

Explanation:

An automobile engine converts the chemical energy stored in the gasoline into the mechanical energy that turns the wheels. Chemical energy is usually converted into thermal energy through combustion, and that heat used to move a piston or spin a turbine

                                                     

                                           HOPE THIS HELPED!!!!!!!

UNO [17]4 years ago
7 0

Answer:

See the explanation below.

Explanation:

An example of chemical to mechanical energy is that of a battery for a toy car, the chemical energy of the battery is used to produce movement of the toy car.

And another example is the coal, its energy is used for water heating and steam generation to move a turbine (make the turbine turn).

If in my room I take a book that is on top of a shelf, its energy changes from potential to kinetic energy as I move it with my hand and decreased the height of the book relative to its initial value.

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the idling engines of a landing turbojet produce forward thrust when operating in a normal manner, but they can produce reverse
Finger [1]

Forward thrust has positive values and reverse thrust has negative values.

Thrust is a sudden push or pull in a certain direction.

a)

Flight speed u = 150 km/h

1 km/h = \frac{1}{3.6} km/s

therefore, 150 km/h =  41.67 km / s

The thrust force represents the horizontal or x-component of momentum equation:

T = m_{exhaust} * U_{exhaust} - U_{flight}

T = 50 * (150 - 41.67)

T = 5416.67 N

Therefore, the value of forward thrust is 5416.67 N.

b)

Now the exhaust velocity is now vertical due to reverse thrust application, then it has a zero horizontal component,

thus thrust equation is:

T = m_{exhaust} * U_{exhaust} - U_{flight}

T = 50 * (0 - 41.67)

T = -2083.5 N

Therefore, the thrust force T is -2083.5 N in the reverse direction.

c)

Now the exhaust velocity and flight velocity is zero, then it has a zero horizontal component, thus thrust is also zero becauseU_{exhaust} = U_{flight} = 0\\

T = 0

Therefore, there is no difference in two velocities in x direction.

The given question is incomplete, the complete question is,

"The idling engines of a landing turbojet produce forward thrust when operating in a normal manner, but they can produce reverse thrust if the jet is properly deflected. Suppose that while the aircraft rolls down the runway at 150 km/h the idling engine consumes air at 50 kg/s and produces an exhaust velocity of 150 m/s.

a. What is the forward thrust of this engine?

b. What are the magnitude and direction (i.e., forward or reverse) if the exhaust is deflected 90 degree without affecting the mass flow?

c. What are the magnitude and direction of the thrust (forward or reverse) after the plane has come to a stop, with 90 degree exhaust deflection and an airflow of 40 kg/s?"

To know more about thrust,

brainly.com/question/14552836

#SPJ1

3 0
2 years ago
What is the kinetic energy of a 1.5x10^3 kg car traveling at 25 m/s?
Naddika [18.5K]

Answer:

468750 J

Explanation:

Kinetic energy = (1/2) (mass)(velocity)^2

7 0
3 years ago
Conductors of electricity *<br> A.Nonmetal<br> B-Metalloid<br> C-Metal
Zielflug [23.3K]

Answer:

Conductors of electricity?

The Answer is C metal :)

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5 0
3 years ago
Read 2 more answers
Need help as fast as possible please
DaniilM [7]
Regular reflections occurs when light reflects off a very smooth surface and forms a clear image.
Diffuse reflection: occurs when light reflects off a rough surface and forms a blurry image or no image at all.

Similarities: they both hit the surface, but the difference is one of them give clear image the other one gives blurry image or no image at all.

Hope this helped!
7 0
3 years ago
Why are the parts of an atom that electrons occupy called electron clouds?
Anna [14]

Because it's literally impossible to tell exactly where something that size is
located at any particular time.

And that's NOT because it's so small that we can't see it.  It's because any
material object behaves as if it's made of waves, and the smaller the object is,
the more the size of its waves get to be like the same size as the object. 
When you get down to things the size of subatomic particles, it doesn't make
sense any more to try and talk about where the particle actually "is", and we only
talk about the waves that define it, and how the waves all combine to become a
cloud of <em><u>probability</u></em> of where the particle is.

I know it sounds weird.  But that's the way it is.  Sorry.


8 0
3 years ago
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