Digital communication techniques
Digital Communication Techniques A video signal contains light variations that change at a frequency as high as 3.5 MHz. What is the minimum sampling frequency for A/D conversion?
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A series of combination having R=2Mohm and C=0.01 UF is connected across a D.C. voltage source of 50V. Determined capacitor voltage and charging current after 0.02s, 0.04s and 1 hour.
A Brayton cycle gas turbine delivers power to an electric generator at 150 MW. The minimum temperature in the cycle is 300 K and the maximum temperature is 1600 K.
What is the change in pH after addition of 10.0 mL of 1.0 sodium hydroxide to 90.0 mL of a 1.0 M NH3/1.0 M NH4+ buffer? [ Kb for ammonia is 1.8 x 10^-5]? 0.1 pH unit, 0.001 pH unit 0.01 pH unit 1.0 pH unit or zero
Water in an open beaker evaporates over time. As the water is evaporating,is the vapor pressure increasing, decreasing, or staying the same?
An aqueous CaCl2 solution has a vapor pressure of 81.1 mmHg at 50 C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent?
An open belt drive connects two pulleys 1.2 and 0.5m diameter on parallel shafts 3.6m apart. The belt has a mass of 0.9kg/m length and maximum tension in it is not to exeed 2kn.
A hollow conducting cylinder has inner radius a and outer radius b and carries current I along the positive z- direction. Find H everywhere.
Assuming the solution has a heat capacity of 4.18 J/°C · g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
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