Worksheetswhy do some buildings fall down in earthquake?
Total questions: 1
Worksheet time: 7mins
What is the natural frequency of a one-meter long pendulum?
0.25 hertz
0.5 hertz
1 hertz
2 hertz
What happens when the period of ground motion matches the natural resonance of a building?
The building undergoes the largest oscillations possible and suffers the greatest damage.
The building remains unaffected.
The building undergoes minimal oscillations.
The building's resonance is canceled out.
What is the resonant frequency of the mass of a low C string?
128 hertz
500 hertz
440 hertz
264 hertz
During the 1985 Mexico City earthquake, which buildings suffered the most damage?
Skyscrapers
Short old weak stone buildings
Medium-height buildings with similar natural periods
All buildings equally
What is resonance?
The tendency of a system to oscillate with greater amplitude at some frequencies than at others.
The tendency of a system to remain at rest.
The process of reducing a system's oscillations.
The frequency at which a system stops oscillating.
What is the effect of doubling the frequency of a wave on its period?
The period doubles.
The period is halved.
The period quadruples.
The period remains the same.
How does the ground's resonant frequency affect buildings during an earthquake?
It increases the building's structural integrity.
It has no effect.
It reduces the building's natural frequency.
It can cause buildings to oscillate more if the frequencies match.
What is the relationship between a building's height and its natural period of resonance?
All buildings have the same natural period.
Taller buildings have longer natural periods.
There is no relationship.
Taller buildings have shorter natural periods.
What contributes to the resonance disaster of a building?
The building's color and design.
The building's location only.
Prolonged energy input at the system's resonant frequency.
The building's age.
How can building design prevent resonance disasters?
By determining the resonant frequency of the ground beneath the building site and modifying the design accordingly.
By making the buildings as tall as possible.
By painting the building in light colors.
By building on soft sediments only.
