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ololo11 [35]
2 years ago
11

A 1.5 kg cart is attached to a spring with spring constant of 5 N/m. The cart & spring is pulled to stretch the spring by 3

meters.
What is the SPE?​
Physics
1 answer:
vaieri [72.5K]2 years ago
3 0

22.5 J

Explanation:

Given:

x = 3 m

k = 5\:\text{N/m}

The spring potential energy PE_s is

PE_s = \frac{1}{2}kx^2 = \frac{1}{2}(5\:\text{N/m})(3\:\text{m})^2

\:\:\:\:\:\:\:=22.5\:\text{J}

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Three-Dimensional Thinking
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A.

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Answer:

D

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If you list and compare, the elephants hearing range is the closest to a humans.

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While the others are either too much more or less than a humans.

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What are food source of calcium?
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5 0
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Today, scientists believe that the main reason the Earth has had periodic ice ages is:____________.
horsena [70]

Answer:

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6 0
3 years ago
Two cars are moving towards each other and sound emitted by first car with real frequency of 3000 hertz is detected by a person
sertanlavr [38]

Answer:

 v ’= 21.44 m / s

Explanation:

This is a doppler effect exercise that changes the frequency of the sound due to the relative movement of the source and the observer, the expression that describes the phenomenon for body approaching s

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in this exercise both the source and the observer are moving, we will assume that both have the same speed,

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we substitute

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               f ’/ f (v-v’) = v + v ’

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let's calculate

                v ’= (3400 -3000) / (3000 +3400) 343

                v ’= 400/6400 343

                v ’= 21.44 m / s

3 0
3 years ago
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