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amid [387]
3 years ago
13

Why does the total amount of energy before and after any energy transformations remain the same?

Physics
2 answers:
myrzilka [38]3 years ago
6 0

Sample Response: Because energy cannot be created or destroyed, the total input is equal to the total output. The total amount of energy remains the same even though it may change forms.

Georgia [21]3 years ago
3 0
The amount of energy before and after any energy transformations remain the same because energy cannot be created or destroyed. From the law conservation of energy; any time energy is transferred between two objects, or converted from one form into another, no energy is created and none is destroyed. The total amount of energy involved in the process remains the same.
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If a 1000-pound capsule weighs only 165 pounds on the moon, how much work is done in propelling this capsule out of the moon's g
Bas_tet [7]

Answer:

  W = 1,307 10⁶ J

Explanation:

Work is the product of force by distance, in this case it is the force of gravitational attraction between the moon (M) and the capsule (m₁)

              F = G m₁ M / r²

              W = ∫ F. dr

              W = G m₁ M ∫ dr / r²

we integrate

             W = G m₁ M (-1 / r)

                 

We evaluate between the limits, lower r = R_ Moon and r = ∞

           W = -G m₁ M (1 /∞ - 1 / R_moon)

            W = G m1 M / r_moon

Body weight is

             W = mg

             m = W / g

The mass is constant, so we can find it with the initial data

For the capsule

            m = 1000/32 = 165 / g_moon

            g_moom = 165 32/1000

            .g_moon = 5.28 ft / s²

I think it is easier to follow the exercise in SI system  

           W_capsule = 1000 pound (1 kg / 2.20 pounds)

           W_capsule = 454 N

           W = m_capsule g

           m_capsule = W / g

           m = 454 /9.8

           m_capsule = 46,327 kg

Let's calculate

          W = 6.67 10⁻¹¹ 46,327   7.36 10²² / 1.74 10⁶

          W = 1,307 10⁶ J

7 0
3 years ago
D
Veronika [31]

Answer:

english please

Explanation:

5 0
3 years ago
The angular position of a pendulum is represented by the equation u = 0.032 0 cos vt, where u is in radians and v = 4.43 rad/s.
Lerok [7]
It's simple. You just need to apply formular onto problem.
8 0
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Dynamic stretching serves 2 purposes warming up and controlling BMI true or false
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Uhm i think false but i’m not sure
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When the air density is 0 kg/m°(vacuum), how long will it take an object to reach terminal velocity?
Drupady [299]

Answer:

d. The object never reaches terminal velocity.

Explanation:

Terminal velocity is the velocity a falling object reaches when the air resistance equals the weight.  But in a vacuum, there is no air resistance.  So the object never reaches terminal velocity.

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