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ivanzaharov [21]
3 years ago
15

An old clock has a spring that must be wound to make the clock hands move. Which statement describes the energy of the spring an

d hands of the clock?
A) The spring has kinetic energy and the hands have kinetic energy.


B) The spring has kinetic energy and the hands have potential energy.


C) The spring has potential energy and the hands have potential energy.
Eliminate

D) The spring has potential energy and the hands have kinetic energy.
Physics
2 answers:
Allushta [10]3 years ago
6 0

Answer:

D) The spring has potential energy and the hands have kinetic energy.

Explanation:

Since the hands are in motion and the spring is wound, the spring has potential energy and the hands have kinetic energy.

kondaur [170]3 years ago
4 0
<span>D) The spring has potential energy and the hands have kinetic energy. </span>
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A cylindrical storage tank has a radius of 1.35 m. When filled to a height of 3.45 m, it holds 14,014 kg of a liquid industrial
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Answer:

709.93 kg/m³

Explanation:

Density: This can be defined as the ratio of the mass of a body to the volume of that body. The S.I unit of density is kg/m³

From the question above,

D = m/v.............................. Equation 1

Where D = density, m = mass, v = volume.

Note: The volume of the liquid is equal to the volume of the height occupied by the liquid in the container

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v = πr²h........................ Equation 2

Where r = radius of the the tank, h = height of the liquid in the tank

Substitute equation 2 into equation 1

D = m/(πr²h)............... Equation 3

Given: m = 14014 kg, r = 1.35 m, h = 3.45 m, π = 3.14

Substitute into equation 3

D = 14014/(3.14×1.35²×3.45)

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