It’s Alex’s birthday! You’ve arranged a group of eight friends to celebrate at a local restaurant. When your party receives their bill, nobody is quite sure what they owe. You only know everyone’s total before tax (5%) and tip (15%). But lucky you! You brought your laptop and are asked to write a program that calculates everybody’s total.7

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?

Find the kinematic pressure of 160kpa. for air, r-287 j/ kg k. and hair al viscosity of air at a temperature of 50°c and an absolute (10 points) (b) find the dynamic viscosity of air at 110 °c. sutherland constant for air is 111k