It could be warmer solid, or liquid, or gas, depending on the pressure and the amount of heat added.
(a) 907.5 N/m
The force applied to the spring is equal to the weight of the object suspended on it, so:

The spring obeys Hook's law:

where k is the spring constant and
is the stretching of the spring. Since we know
, we can re-arrange the equation to find the spring constant:

(b) 1.45 cm
In this second case, the force applied to the spring will be different, since the weight of the new object is different:

So, by applying Hook's law again, we can find the new stretching of the spring (using the value of the spring constant that we found in the previous part):

(c) 3.5 J
The amount of work that must be done to stretch the string by a distance
is equal to the elastic potential energy stored by the spring, given by:

Substituting k=907.5 N/m and
, we find the amount of work that must be done:

Answer:
Joanna's position would be -100.
Explanation:
Joanna's position would be 100 feets west to her house. Her position is negative because Joanna walked west of her house. The position would have been positive if she had moved east of his house, that is, to the school.
Moving water, wind, gravity, and ice are the five natural agents of erosion
The modifications that are implemented after Tacoma bridge disaster are added trusses and openings below road decks to decrease oscillations.
<h3>Why Tacoma Bridge disaster occurred?</h3>
While marching, the natural frequency of the vibrations of marching soldiers matched up with the resonant frequency of the bridge. This resulted in the collapsing of the bridge in seconds.
Because of the disaster of the Tacoma Narrows Bridge, the bridge was strengthened by adding trusses as well as openings below road decks so as to decrease vibrations caused by running vehicles on the bridge.
Thus, the modifications that are implemented after Tacoma bridge disaster are added trusses and openings below road decks to decrease oscillations
Learn more about Tacoma Bridge disaster.
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