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patriot [66]
3 years ago
8

How do base-isolators, the rubber and steel pads under some buildings, reduce earthquake damage?

Physics
2 answers:
nika2105 [10]3 years ago
8 0

They absorb the energy of seismic waves.

Explanation:

Base - isolators, rubber and steel pads under buildings reduces earthquake damage by absorbing the energy of seismic waves.

  • Earthquakes are produced by the sudden release of energy within the earth which causes displacement and sharp movement on earth surface.
  • There are four main types of waves that are propagated by seismic waves which wrecks havoc.
  • Understanding the waves and their properties has been useful in designing earthquake resistant structures.
  • Base-isolators, rubber and steel pads helps to absorb seismic waves.
  • When seismic waves are absorbed, they are cut off.
  • This way they cannot cause damage.

learn more:

Earthquake brainly.com/question/6520403

#learnwithBrainly

lisabon 2012 [21]3 years ago
4 0

Answer:

D

Explanation:

it just is

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The magnification produced by a plane mirror is +1

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A 740-kg boulder is raised from a quarry 119 m deep by a long uniform chain having a mass of 550 kg . This chain is of uniform s
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Answer:

A) the maximum acceleration the boulder can have and still get out of the quarry

B) how long does it take to be lifted out at maximum acceleration if it started from rest

Explanation:

A)

let +y is upward. look below at the free body diagram. the mass M refers to the combined mass of the boulder and chain.

the weight of the chain is:   w_{c} =m_{c} g   and maximum tension is T=2.50 m_{c} g=1.41*10^4N

total mass and weight is :

M =m_{c}+ m_{b} =740kg+550kg=1290 kg

w_{M} =1.2650*10^4N

∑F_{y} =ma_{y}

T-M_{g} =Ma_{y}

a_{y} =(t-M_{g} )/M=(2.50m_{c} -M_{g} )/M=(2.50.550kg-1290kg)(9.8m/s^2)/1290kg

=0.645m/s^2

B)

maximum acceleration

a_{y} =0.645m/s^2\\\\y-y_{0} =119m\\v_{0y} =0

using y-y_{0} =v_{oy} t+1/2(a_{y} )t^2

to solve for t

t=\sqrt{2(y-y_{0} )/a_{y} }

t=\sqrt{2(119m)/0.645m/s^2} =19.20s

6 0
3 years ago
Which statement describes why ocean currents are considered convection currents?
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How does a solenoid convert energy from one form to another?​
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Answer:

A solenoid is a device comprised of a coil of wire, the housing and a moveable plunger (armature). When an electrical current is introduced, a magnetic field forms around the coil which draws the plunger in. More simply, a solenoid converts electrical energy into mechanical work.

Explanation:

The coil is made of many turns of tightly wound copper wire. When an electrical current flows through this wire, a strong magnetic field/flux is created.

The housing, usually made of iron or steel, surrounds the coil concentrating the magnetic field generated by the coil.

The plunger is attracted to the stop through the concentration of the magnetic field providing the mechanical force to do work.

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