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Amiraneli [1.4K]
3 years ago
9

Yes this nees helppppppppppppppp

Physics
1 answer:
kozerog [31]3 years ago
6 0

Answer:

lol

Explanation:

it was funny

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What are the importance of regulare<br>health examination.​
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The purpose of regular health examination is to evaluate health status, screen for risk factors and disease, and provide preventive counseling interventions. The major benefits of regular health examination is early detection of treatable disease.

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A carpenter is driving a 15.0-g steel nail into a board. His 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. Half
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Answer: The increase in temperature of the nail after the three blows is 8.0636 Kelvins. The correct option is (d).

Explanation:

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Energy transferred to the nail in one blow =

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Total energy transferred after 3 blows,Q =3\times 18.0625 J=54.1875 J

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Q=mc\Delta T

54.1875 J=0.015 kg\times 448 J/kg K\times \Delta T

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The increase in temperature of the nail after the three blows is 8.1  Kelvins.Hence, correct option is (d).

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An airplane takes off a runway at a constant speed of 49m/s at constant angle 30 to the horizontal
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Complete Question

An airplane takes off a runway at a constant speed of 49 m/s at constant angle 30 to the horizontal.How high (in meters )  is the airplane above the ground 13 seconds after takeoff?

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The height  is H  =  318.5 \ m

Explanation:

From the question we are told that

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      The angle at which it takes off is  \theta  =  30 ^o

        The time taken is t =  13  s

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Substituting values  

         H  =  (49) * sin (30) *13

        H  =  318.5 \ m

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