Why do seismic waves travel faster through the upper mantle than in the core? Why does a seismic wave travel faster through the upper mantle than it does in the crust?
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E tlameha ebe u nahanne ka ntho e itseng
U tla boela u rate sena
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Re ne re utloisisa pelo ena
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Tahlehelo ea hau ho
Ha ho letho le nkang ho 'na
O fumana lerato le eketsehileng
Kahoo ha ke khone
E ne e le ntho e khethehileng e neng e tla tseba
U ka be u bone ho tloha mahlong a ka
E lahlehetsoe ke taba ena
U se ke ua leka ntho efe kapa efe eo ue entseng
Tahlehelo ea hau ho
Ha ho letho le nkang ho 'na
O fumana lerato le eketsehileng
Kahoo ha ke khone
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