Created by StemPy LabTwo resistors of each are connected in series across an ideal battery of . A voltmeter whose own resistance is is connected across one of the resistors. The reading of the voltmeter, in volts, is ____.
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← An ambulance moves at 34 m/s straight towards a person standing still by the road. Its siren sounds at a steady frequency of 900 Hz. The air is still, and the speed of sound is 340 m/s. The frequency heard by the person, in hertz, is ____.A thin prism of angle 6°, made of glass of refractive index 1.5, is combined with a second thin prism made of glass of refractive index 1.75. The second prism is placed the other way round, so that the combination produces no deviation of the light (for the colour these indices refer to). The angle of the second prism, in degrees, is ____. →
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