3 years ago

What material reduces thermal energy

Physics

1 answer:

expeople1 [14]3 years ago

3 0

Answer:

Insulation helps to prevent that transfer of heat.

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Explain why some of the tree get detached from a tree if we vigorously shake it's Branch.

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A motorbike is travelling with a velocity of 3m/s. It accelerates at a rate of 9.3m/s for 1.8s. Calculate the distance it travel

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Explanation:

Consider the kinematic equation,

$x = vt + \frac{1}{2} a {t}^{2}$

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through simple algebra we get

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3 years ago

A wheel rotating about a fixed axis has a constant angular acceleration of 4.0 rad/s2. In a 4.0-s interval the wheel turns throu

anastassius [24]

Answer:

a. 3 s.

Explanation:

Given;

angular acceleration of the wheel, α = 4 rad/s²

time of wheel rotation, t = 4 s

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Apply the kinematic equation below,

$\theta = \omega_1 t \ + \ \frac{1}{2} \alpha t^2\\\\80 = 4\omega_1 + \frac{1}{2}*4*4^2\\\\80 = 4\omega_1 + 32\\\\ 4\omega_1 = 48\\\\ \omega_1 = \frac{48}{4}\\\\ \omega_1 = 12 \ rad/s$

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Therefore, the wheel had been in motion for 3 seconds.

a. 3 s.

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3 years ago

A rock moving a 15m/s accelerates at 9.8m/s for 12s. what is the final velocity of the rock?

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