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4vir4ik [10]
4 years ago
5

What are the three types of seismic waves? which one does the most damage to property?

Physics
1 answer:
galben [10]4 years ago
6 0

<span>In an earthquake, three basic types of seismic waves are created: </span>P-waves<span>, </span>S-waves<span> and surface waves. P-waves or primary / pressure wave and S-waves or secondary / shear wave are collectively called body waves.  But t<span>he surface waves does the most damage to property as it <span>can be much larger in </span><span>amplitude.</span></span></span>

<span><span><span /></span>
</span>

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A night lamp uses a 30 W bulb. If it is left on continuously for 8 hours, how much energy will it use?
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Answer:

Explanation:

30W * 8 h = 240 Wh = 0.240 kWh

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At high speeds, a particular automobile is capable of an acceleration of about 0.540 m/s^2. At this rate, how long (in seconds)
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Answer:

t = 6.68 seconds

Explanation:

The acceleration of the automobile, a=0.54\ m/s^2

Initial speed of the automobile, u = 91 km/hr = 25.27 m/s

Final speed of the automobile, v = 104 km/hr = 28.88 m/s

Let t is the time taken to accelerate from u to v. It can be calculated as the following formula as :

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

t=\dfrac{28.88-25.27}{0.54}

t = 6.68 seconds

So, the time taken by the automobile to accelerate from u to v is 6.68 seconds. Hence, this is the required solution.

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Choose ALL of the answers that would support the theory of Continental Drift?
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The answers are B, D, E!
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Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below. Overl
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Answer:

A). A few of the positive particles aimed at a gold foil seemed to bounce back off of the thin metallic foil.

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Scientists decided to change the model of the atom when they discovered new evidence that showed 'few of the positive particles aimed at a gold foil seemed to bounce back off of the thin metallic foil.' On this ground, <u>Rutherford concluded that atom is mostly made up of empty space and thus, he proposed a nucleus model of atom in which the atom comprises of the tiny and positively charged nucleus is surrounded by electrons with a negative charge</u>. Thus, <u>option A</u> is the correct answer.

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To solve this problem we will use the concepts related to Torque as a function of the Force in proportion to the radius to which it is applied. In turn, we will use the concepts of energy expressed as Work, and which is described as the Torque's rate of change in proportion to angular displacement:

\tau = Fr

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F = Force

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Replacing we have that,

\tau = Fr

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\tau = 11.55Nm

The moment of inertia is given by 2.5kg of the weight in hand by the distance squared to the joint of the body of 24 cm, therefore

I = 0.25Kg\cdot m^2 +(2.5kg)(0.24m)^2

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PART B)

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