World Geography
Ultrasound which is upper limit of human hearing is characterized by which of the following frequencies?

Below 20 KHz
Above 20 KHz
Above 200 KHz
Above 2 KHz

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World Geography
Which among the following pairs is/are correctly matched?Horst – Depressed block of planetary crust bordered by parallel faultsOceanic trench  – Depressed block of planetary crust bordered by parallel faultsSelect the correct code from the options given below:

Both 1 & 2
Neither 1 & 2
Only 2
Only 1

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World Geography
Which among the following statements is correct about Mesa?

It is a small hill
It is a secluded hollow
It is an elevated area of land with a flat top and sides that are usually steep cliffs
It is a narrow pass or gorge between mountains or hills

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World Geography
The initial increase of magnetic field in magnetic storms is caused

when the shock wave, associated with the gusty solar wind, compresses the magnetosphere
None of these
when the gust wind itself engulfs the magnetosphere
when there is a large decrease in field intensity

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