Physics Sound becomes hazardous noise pollution at decibels? Above 50 db Above 80 db Above 120 db Above 30 db Above 50 db Above 80 db Above 120 db Above 30 db ANSWER DOWNLOAD EXAMIANS APP
Physics Lakes freeze in cold countries in winter, leaving the water underneath at 0°F 4°F 0°C 4°C 0°F 4°F 0°C 4°C ANSWER DOWNLOAD EXAMIANS APP
Physics A water tank appears shallower when it is viewed from top due to Reflection Total internal reflection Rectilinear propagation of light Refraction Reflection Total internal reflection Rectilinear propagation of light Refraction ANSWER DOWNLOAD EXAMIANS APP
Physics Man perceives sound vibrations in the frequency ranges of 0 – 5 Hz 20 – 20000 Hz 11 – 20 Hz 6 – 10 Hz 0 – 5 Hz 20 – 20000 Hz 11 – 20 Hz 6 – 10 Hz ANSWER DOWNLOAD EXAMIANS APP
Physics For which of the following substances, the resistance decreases with increase in temperature? Pure silicon Nichrome Copper Platinum Pure silicon Nichrome Copper Platinum ANSWER DOWNLOAD EXAMIANS APP
Physics An object at rest will remain at rest and an object in motion will remain in motion until and unless it is acted upon by an external force. This is Newton's Fourth law First law Second law Third law Fourth law First law Second law Third law ANSWER DOWNLOAD EXAMIANS APP
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