Chapter 1, Problem 1P

1.1 A steam power station uses coals of calorific value of 5308 kcal/kg. The overall efficiency of the power station is 21.5% and a coal power station uses 6,98tonnes of coal every 15 minutes to generate the maximum demand. The purchasing price of coals is R600 per tonne. (NB: 1 kWh = 861 kcal)(a) Determine the coal consumption in kg per kWh (b) Determine the cost of purchasing the coals per week if the load factor is 65%.

A graduated cylinder was filled with gasoline to 100 ml. Its total mass was 188 g including the 120 g cylinder. If 20 g of gasoline evaporated, what would be the reading on the graduated cylinder? 78.1 86.4 a. 62.2 b. 70.6 C. d.

The production data for a well is as follows; 450 bbl/day of water 2800 bbl/day of 34.5o API oil 9.85 mscf/day of gas What is the density of the oil in kg/m3? (Input your answer in the space below to 2 decimal places)

Points: 201 3) Three objects are connected by massless wires over a massless frictionless pulley as shown in the figure. The tension in the wire connecting the 10.0-kg and 15.0-kg objects is measured to be 133 N. M A 15.00 kg 133 N (a) What is the mass M? 10.00 kg (b) What is the acceleration of M? (c) What is the tension in wire A?

A reservoir of oil has a mass of 830 kg. The reservoir has a volume of 0.920 m³. What will be the value of weight density? Select one: 3 O a. 88.50326 KN/m 3 O b. 90.2173 Kg/m 3 O c. 8850.326 N/m O d. 902.173 Kg/m

A cylinder contains 0.12m3 of air at 1 bar and 90°c. It is compressed to 0.03m³, the final pressure being 6 bar. The index of the compression will be A. 1.292 В. 1.364 С. 1.521 D. 1.694

Joules constant, 4.1868 J/cal, is an equivalence relation for 4.1868 Joules of work for 1 calorie of heat delivered to a substance. ABTU is a British Thermal Unit (another measure of heat). If1BTU-252 cal, how many kilojoules equal 5.2 BTU? Express your answer to 4 significant digits and include the proper unit.

As of October, 2016 the world's largest pumpkin weighed 1190 kilograms. In order to grow a record-setting pumpkin, the fruit's mass must increase by an average of 18 kg/day. If we assume that the density of raw pumpkin is approximately 0.50g/cm³ we can convert this to an increase in volume of 1.27ft³/day. If the volume of a spherical pumpkin is increasing at 1.27ft³/day, then how fast is the surface area of the pumpkin changing when the diameter of the pumpkin is 7 ft? Give the answer with two decimal places, and include units.

3) Make use of Table 1.4 to express the following quantities in English units (ft, s, lb) : (a) 69.4 Pa, (b) 9.14 N/m³, (c) 6.75 mm²/hr.