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rewona [7]
2 years ago
12

Atoms that are bonded together to form a new material with new properties and characteristics. .

Physics
1 answer:
mihalych1998 [28]2 years ago
7 0

Answer:

Explanation:

Atoms form chemical bonds to make their outer electron shells more stable. ... An ionic bond, where one atom essentially donates an electron to another, forms when one atom becomes stable by losing its outer electrons and the other atoms become stable (usually by filling its valence shell) by gaining the electrons.

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Stan is driving north on his scooter at 8m/s, accelerates 11m/s (North) in 4s, drives a constant velocity for the next 15s, and
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A) Acceleration: a_1 = 0.75 m/s^2, a_2 = 0, a_3 = -1.57 m/s^2

B) The total displacement is 209.5 m north

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Explanation:

A)

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a=\frac{v-u}{t}

where

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u = 8 m/s north

v = 11 m/s north

t = 4 s

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- In the second segment, Stan drives at a constant velocity: so the final velocity is equal to the initial velocity,

u = v

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v = 0 (he comes to a stop)

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B)

In a uniformly accelerated motion, the displacement can be calculated as:

s=ut+\frac{1}{2}at^2

where

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u = 0\\a = 0.75 m/s^2\\t=4 s

So the displacement is

s_1 = 0+\frac{1}{2}(0.75)(4)^2=6 m

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u = 11 m/s\\a = 0\\t=15 s

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s_2 = (11)(15)+0=165 m

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u = 11\\a = -1.57 m/s^2\\t=7 s

So the displacement is

s_3 = (11)(7)+\frac{1}{2}(-1.57)(7)^2=38.5 m

So the total displacement is:

s = 6 m + 165 m + 38.5 m = 209.5 m

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C)

The average velocity is given by:

v=\frac{d}{t}

where

d is the total displacement

t is the total time

Here we have:

d = 209.5 m

t = 26 s

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v=\frac{209.5}{26}=8.06 m/s (north)

Learn more about accelerated motion:

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