Physics The fact that the planets move around the Sun, not in circles but in ellipses, was first demonstrated by Johannes Kepler Galileo Martin Luther Copernicus Johannes Kepler Galileo Martin Luther Copernicus ANSWER DOWNLOAD EXAMIANS APP
Physics What is the wavelength of visible spectrum ? 1300 A°–3000 A° 8500 A° – 9800 A° 7800 A° – 8000 A° 3900 A° – 7600 A° 1300 A°–3000 A° 8500 A° – 9800 A° 7800 A° – 8000 A° 3900 A° – 7600 A° ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following is a device designed to protect electrical devices from voltage spikes? Surge protector Voltage unloader Heat protector Current unloader Surge protector Voltage unloader Heat protector Current unloader ANSWER DOWNLOAD EXAMIANS APP
Physics The magnifying power of an astronomical telescope can be decreased by Increasing the focal length of the objective Decreasing the focal length of the eyepiece Increasing the focal length of the eyepiece None of these Increasing the focal length of the objective Decreasing the focal length of the eyepiece Increasing the focal length of the eyepiece None of these ANSWER DOWNLOAD EXAMIANS APP
Physics Mercury is commonly used as a thermometric fluid rather than water because specific heat of mercury is more than water density of mercury is more than the water mercury has greater visibility than water specific heat of mercury is less than water specific heat of mercury is more than water density of mercury is more than the water mercury has greater visibility than water specific heat of mercury is less than water ANSWER DOWNLOAD EXAMIANS APP
Physics Ultrasound devices operate with minimum frequency from 60 kHz 45 kHz 20kHz 35 kHz 60 kHz 45 kHz 20kHz 35 kHz ANSWER DOWNLOAD EXAMIANS APP
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