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jeyben [28]
2 years ago
11

True or false a self contained living thing is called adaptation

Physics
1 answer:
motikmotik2 years ago
4 0

a self contained living thing is called adaptataion is true

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In an arcade game a 0.135 kg disk is shot across a frictionless horizontal surface by compressing it against a spring and releas
ioda

Answer:

v=2.42m/s

Explanation:

We use the energy conservation theorem in order to solve the problem. The energy when the spring is compressed is equal at the energy when the disk leaves the spring:

E_{initial}=E{final}\\E_{k-initial}+E_{p-initial}=E_{k-final}+E_{p-final}\\0+\frac{1}{2}kx^2=\frac{1}{2}mv^2+0

At the beginning the initial energy is totally potential, energy linked to the compressed spring. At the end the energy is totally kinetics

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k=162 N/m

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m=0.135 kg

v=x*\sqrt{k/m}=0.07*\sqrt{162/0.135}=2.42m/s

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Which describes radioactive decay of a substance?
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3 years ago
A spinning disk is rotating at a rate of 5 rad/s in the positive counterclock-wise direction. If the disk is subjected to an ang
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Answer:

ωf = 13 rad/s

Explanation:

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  • α = Δω/Δt = (ωf-ω₀) / (tfi-t₀)
  • Choosing t₀ = 0, and rearranging terms, we have

       \omega_{f} = \omega_{o} + \alpha *t  (1)

       where ω₀ = 5 rad/s, t = 4 s, α = 2 rad/s2

  • Replacing these values in (1) and solving for ωf, we get:

        \omega_{f} = 5 rad/s + (2 rad/s2*4 s) = 13 rad/s (2)

  • The wheel's angular velocity after 4s is 13 rad/s.
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