Engng Fundamentals

• Rankine (considering Farenheit)


  +460
• Standard Cp (Heat)


  4.187 kJ/kg•m²
• Specific Density of Water


  1000 kg/m³
• Specific Density of Air/Gas


  1.2 kg/m³
• The inverse of density


  Specific Volume
• Specific weight is


  mg/v
• In Boyle's Law, the Pressure and Volume is 


  Inversely Proportional to each other
• Formula of Internal Energy considering Calorific Value (Heat)


  ∆U = mCv∆T
• The Resistivity Formula


  R = pl/A
• Formula of Power in EEE

  P = V²/R
• Ah bucket of concrete of total mass 400lbm is raised by crane with an acceleration of 6 ft/s² relative to the ground at a location where the local gravitational acceleration is 31 ft/s². What is the required force?

  460 lbf
• Gravity in lbf ft/s²

  32.174
• If the specific weight of a liquid is 58.5 lb force per cubic foot, what is the specific volume of the liquid?

  1.607 cm³/g
• Standard Density of Water in lb/ft³

  62.4 lbm/ft³
• Air temperature is 250 rankine what is the equivalent of the saving in kelvin?

  138.6K
• At what temperature readings to the fahrenheit and celsius skills have the same value?

  -40 degrees
• A cylinder ways 150 lb force. It's cross sectional area is 40 in². When the cylinder stands vertically on one end, what pressure does the cylinder exert on the floor?

  25.8 kPa
• A vertical column of water will be supported to what height by standard atmospheric pressure?

  34 ft or 10.36m
• If the gauge pressure of a medium is 30 kPa (vacuum) and the atm is 101.3 kpa, what is the absolute pressure?

  71.3 kPa
• What is the volume flow rate through a pipe 4 in in diameter carrying water at a velocity of 11 ft/s

  430.85 gpm
• Air moves in a steady flow man are between two sections in a flow line. At section 1, A1 = 10ft², v1=100fpm, V1 = 4ft³/lb. At section 2: A2 = 2ft², p2 = 0.2 lb/ft³. Calculate the speed at section 2.

  10.42 ft/s
• A garden hose attached with a nozzle is used to fill a 10 gallon bucket. The inner diameter of the hose is 2 cm and it reduces to 0.8 cm at the nozzle exit. If it takes 50 seconds to fill the bucket with water determine the average velocity of water at the nozzle exit.

  15 m/s
• Assuming that there no heat effects and no friction effects find the speed of the 3,220 lb mass body after it falls 778 ft from the rest.

  224 ft/sec
• What is the temperature of 2L of water at 30°C after 500 calories of heat have been added to it?

  30.25 °C
• Calorie of Water

  1 kcal/kg•°C
• Determine the amount of it required for 10 kg of water at 24°C to turn into vapor at 100° C

  5150 kJ
• An a diabetic tank contains 10 kg of water stayed by 11 watts steering motor for 1 hour. determine the change in specific internal energy of the water.

  39.6 kJ/sec
• Steam enters a turbine stage with an enthalpy of 2846 kJ/kg and a velocity of 124 m/s. Calculate the work done by the steam


  776.8 kJ/kg
• So if the pressure of a confined gas at a constant temperature is tripled what will happen to the volume?

  The volume will be reduced to 1/3 of its original.
• What is the resulting pressure when one pound of air at 1.3 psig and 200°F is heated at constant volume to 800° F?

  28.6 psia
• A transportation company specializes in the shipment of pressured gaseous materials. An order is received from 100 l support a particular class at STP. What minimum volume talk and necessary to transport the gas at 8°F in a maximum pressure at 8 atm?

  13.7 L
• Bicycle tire has a volume of 600cm³. It is inflated with carbon dioxide with the pressure of 551.43 kPa at 20°C. How many grams of carbon dioxide are contained in the tire? For CO2, R=188.96 J/kg•K

  5.98 g
• An ideal gas undergoes a process so that the internal energy is equals to 94 btu and the heat is equals to 122.7 btu determine the specific ratio of this gas.

  1.305
• An alternating i=70.7 sin520t. Determine the frequency and the current 0.0015 seconds after passing through zero.

  82.8 Hz ; 49.7 A
• What is a total capacitance of a series connected capacitors: 25 40 and 30 uF

  10 uF