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Mnenie [13.5K]
2 years ago
14

A 65 kg woman is inside an elevator. (A) Calculate her apparent weight (normal force) in Newtons if the elevator moves at consta

nt speed of 10 m/s downward. Be sure to keep 3 significant digits.
Physics
1 answer:
stiks02 [169]2 years ago
3 0

Answer:

W = 637 N

Explanation:

For this exercise we will use Newton's second law

         F -W = m a

where F is the force, m the mass and the acceleration

in this case the force is the weight of the body and as the elevator goes at constant speed the acceleration is zero

         F = W

         a = 0

       

          F = W

          W = m g

          W = 65 9.8

          W = 637 N

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A parcel of land is in the shape of an isosceles triangle. The base has a length of 425 ft.; the other sides, which are of equal
kogti [31]

Answer:

The answer to your question is 636.6 ft    

Explanation:

Data

base = 425 ft

angle = 39°

See the picture below

1.- Divide the triangle to get two right triangles.

    Now the superior angle will measure 19.5° and the opposite side will measure 212.5 ft

2.- Use the trigonometric function sine to find the hypotenuse

     sin 19.5 = 212.5/hyp

solve for hyp

    hyp = 212.5 / sin 19.5

Result

    hyp = 212.5/ 0.333

    hyp = 636.6 ft    

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Answer:

Explanation:

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Heat released = mass x latent heat of vaporization

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Heat released = mass x specific heat x( 100-0)

= 2 x 4.2 x 100 = 840 J

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Heat released = mass x latent heat of fusion

= 2 x 334 = 668 J

When 2 grams of steam at 100 degrees Celsius turns to ice at 0 degrees Celsius heat released will be sum of all the heat released as mentioned above ie

4520 + 840 +668 = 6028 J

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Answer:

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Explanation:

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