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Rus_ich [418]
3 years ago
15

Use the drop-down menus to complete the statement.

Physics
2 answers:
patriot [66]3 years ago
7 0

Answer:

Look at the picture

Explanation:

lbvjy [14]3 years ago
6 0

Answer:

kinetic and electrical

Explanation:

answered on edu

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Vesna [10]

Answer:1.) 2 seconds

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The law of conservation of matter states that matter can be neither created nor destroyed. Your friend shows you the following c
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7 0
3 years ago
you stretch a spring by a distance of 0.3 m. the spring has a spring constant of 440 n/m. when you release the spring, it snaps
Alina [70]

Answer:

19.8 J

Explanation:

According to the law of conservation of energy, the total mechanical energy of the spring (sum of kinetic energy and elastic potential energy) must be conserved:

K_i + U_i = K_f + U_f (1)

where we have

K_i is the initial kinetic energy of the spring, which is zero because the spring starts from rest (2)

U_i is the elastic potential energy of the spring when it is fully stretched

K_f is the kinetic energy of the spring when it reaches the natural length

U_f is the elastic potential energy of the spring when it reaches its natural length, which is zero because the stretch in this case is zero (3)

So

U_i = \frac{1}{2}k(\Delta x_i)^2

where

k = 440 N/m is the spring constant

\Delta x_i = 0.3 m is the initial stretching of the spring

Substituting,

U_i = \frac{1}{2}(440)(0.3)^2=19.8 J

And so using eq.(1) and keeping in mind (2) and (3) we find

K_f= U_i = 19.8 J

8 0
3 years ago
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