World Geography Ultrasound which is upper limit of human hearing is characterized by which of the following frequencies? Below 20 KHz Above 200 KHz Above 2 KHz Above 20 KHz Below 20 KHz Above 200 KHz Above 2 KHz Above 20 KHz ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Ultrasound refers to a sound wave with a frequency greater than the upper limit of human hearing, which is generally over 20 kHz. In general, humans can hear sounds with a frequency between 20 Hz and 20 kHz.
World Geography Who constructed Suez Canal? Voin Rimsky-Korsakov Fyodor Litke Pyotr Semyonov-Tyan-Shansky Ferdinand de Lesseps Voin Rimsky-Korsakov Fyodor Litke Pyotr Semyonov-Tyan-Shansky Ferdinand de Lesseps ANSWER DOWNLOAD EXAMIANS APP
World Geography The production of wheat has increased mainly due to increase in prices increase in demand for wheat increase in yield per hectare increase in area under wheat increase in prices increase in demand for wheat increase in yield per hectare increase in area under wheat ANSWER DOWNLOAD EXAMIANS APP
World Geography The Palaeozoic era starts at ____ million years ago and ends at ____ million years ago. 500, 100 470, 150 470, 225 570, 225 500, 100 470, 150 470, 225 570, 225 ANSWER DOWNLOAD EXAMIANS APP
World Geography The second largest island (next to Greenland) in the world is Malagasy New Guinea Borneo Sumatra Malagasy New Guinea Borneo Sumatra ANSWER DOWNLOAD EXAMIANS APP
World Geography The most recent era of the geological time scale is Triassic Cenozoic Paleocene Mesozoic Triassic Cenozoic Paleocene Mesozoic ANSWER DOWNLOAD EXAMIANS APP
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