The tenth phone installed in a new subdivision
The probability that a person will install a black telephone in a residence is estimated to be 0.3. Find the probability that the tenth phone installed in a new subdivision is the fifth black phone.
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What mass of NaCl must be dissolved in 65.0 grams of water to lower the freezing point by 7.50 °C? The freezing point depression constant, Kfp, for water is -1.86 °C/m. Assume the van't Hoff factor for NaCl is 1.87
Why can you make the assumption that all of the SCN- (reactant)ion in the solutions has been converted to FeNCS2+ ion?
A dry bearing, of width 25 mm, supports a horizontal shaft of 35mm diameter that rotates at 10 r.p.m. The load on the bearing is a steady one of 1000 N.
A 100.-L flask contains a mixture of methane (CH4) and argon at 25C. The mass of argon present is 228 g and the mole fraction of methane in the mixture is 0.650. Calculate the total kinetic energy of the gaseous mixture.
Twenty grams of liquid mercury at 98.0 °C is placed in 47.0 g of water initially at 25.0 °C. What is the final temperature of the water, assuming the styrofoam calorimeter absorbs no heat at all?
The best explanation of boiling point elevation caused by dissolving sodium chloride in water is because
The solubility of solid ZnCO3 is enhanced in acid, due to the reaction of carbonate with acid. What is the equilibrium constant for the reaction of solid ZnCO3 with acid?
4An analog signal xa(t), band-limited to 5 Hz, is sampled at a rate of 10 samples per second to give a discrete-time signal x(n) = xa(0.1n). The discrete-time signal x(n) is then filtered with an digital FIR filter, h.Find the shortest impulse
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