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3 years ago

15

A gasoline engine transform approximately 34 percent of the fuel's chemical energy into mechanical energy. if energy is conserve

d what happenes to the other 66 percent?

1 answer:

nekit [7.7K]3 years ago

6 0

A) Most is transformed into thermal energy. I took the test.

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LenKa [72]

Answer:

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Explanation:

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3 years ago

what is the maximum distance we can shoot a dart,from ground level provided our toy dart gun gives a maximum initial velocity of

mestny [16]

Answer:

R = v^2 sin 2 theta / g

The range provides the distance a projectile can travel

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3 years ago

The block in the diagram below is AT REST. However, the tension in the cable is not the only thing holding the block back. Stati

Vedmedyk [2.9K]

Answer:

The tension in the rope is 229.37 N.

Explanation:

Given:

Mass of the block is, $m=33.2\ kg$

Coefficient of static friction is, $\mu = 0.214$

Angle of inclination is, $\theta = 31.5$ °

Draw a free body diagram of the block.

From the free body diagram, consider the forces in the vertical direction perpendicular to inclined plane.

Forces acting are $mg\cos \theta$ and normal $N$ . Now, there is no motion in the direction perpendicular to the inclined plane. So,

$N=mg\cos \theta\\N=(33.2)(9.8)\cos (31.5)\\N=277.415\ N$

Consider the direction along the inclined plane.

The forces acting along the plane are $mg\sin \theta$ and frictional force, $f$ , down the plane and tension, $T$ , up the plane.

Now, as the block is at rest, so net force along the plane is also zero.

$T=mg\sin \theta+f\\T=mg\sin \theta +\mu N\\T= (33.2)(9.8)(\sin (31.5)+(0.214\times 277.415)\\T= 170+59.37\\T=229.37\ N$

Therefore, the tension in the rope is 229.37 N.

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3 years ago

What is the main reason why fewer nuclear power plants are being built today, compared to 40 years ago?

shusha [124]

<span>nuclear power plants have become to expensive these days

</span>

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3 years ago

It is science time! You and your classmates have been challenged to identify six minerals. You begin with a dull, white sample t

DaniilM [7]

The mineral is probably TALC.
Talc is white in colour, it has a dull luster and is very soft, which means that it can be scratched by finger nail. Another mineral which has properties that is almost the same with that of talc is calcite. It is also white in colour and is easily scratched by finger nail, but in its own case, the luster is dull and glassy.

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4 years ago