Created by StemPy LabA coin is placed on a horizontal turntable, from its axis. The coefficient of static friction between the coin and the turntable is . The turntable is started from rest and its rate of turning is increased very slowly. Taking , the largest angular speed at which the coin stays in place, in rad/s, is ____.
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← A light-emitting diode (LED) gives out red light of wavelength 650 nm. The light comes from electrons falling across the energy gap of the semiconductor. Using hc = 1240 eV nm, the band gap of the semiconductor is closest toIn a well-insulated container of negligible heat capacity, 100 g of ice at -10°C is mixed with 200 g of water at 50°C. The specific heat of ice is 0.5 cal g⁻¹ °C⁻¹, the specific heat of water is 1 cal g⁻¹ °C⁻¹, and the latent heat of fusion of ice is 80 cal/g. The final temperature of the mixture, in degrees Celsius, is ____. →
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