19. 20. 21. 22. Determine the force (in kN) on a machine part which supports a load of 65.0 kg and is accelerating at 15 W52. Determine the pressure (in kPa) on a vertical column which carries a load of 280 000 kg and has a cross-section area of 120 cm". The Stefan Boltzmann constant used in the equation for rate of heat transfer by radiation has the value 1.72x10-9.__.___Bt'-| h _ \"2 _ R4 Convert the constant to its value in A given that 5K = 9H\" crn2 - K4 A popular lottery involves choosing six numbers from one to forty-nine. The number of possible combinations is 4905. a) Determine the number of possible combinations. b) How many possible combinations would there be in the lottery it it changed to choosing seven of forty-nine numbers? 1. 2. 3. 4. Complete the following table: Measured Accuracy Precision Fiound to Round to Quantity 3 s.d. 1 s.d. 2.0871: 0.050 50 F erooaokg _- 840.0 m2 23.456 L Rewrite each measurement in the two alternate forms. Standard ' ' Engineering Form ' Notation 2043000m3 Calculate the perimeter of a property if the lengths of the sides are 23.0 m; 35.32 m: 106.3 m and 34.058 m. Write the answer to a precision of 0.1 m. Perform each oi the following calculations with the calculator in oating point mode. Write answers to three signicant digits in each of the three modes: oating point; scientic; engineering. 5.1?3 0.0433 b) c = Jojo? +1242 2(9.70)(12.4)(o.731) a) P =17.3 5. For a trusturn of a cone, calculate the toliowing (to 4 s.d.): Use calculator brackets and memories to store entered and calculated values so that r. Ft and h are each entered only once, and sub answers are not re-entered. a) A1 = era. and r = 5.27cm b) A2 = EH2 . and Ft: 9.73cm c) 3: (Ftr)2+h2 .andh=27.4cm d) S =ns(FI+r) a) V=%(A1+A2+JA1A2) By the unit ratio technique. perform each of the following conversions. 6. Convert 0.0615 ft3 to mL. 7. Convert 127.4 yd2 to ma. 8. Convert 0.0672 kg to cg. 9. Convert 1.805 ft to cm. 10. Convert 65 000 cm2 to m2. 11. Convert 184 Ltorn3. 12. Convert 3.5? short tons to kg. 13. Convert 1.65 acre-ft to hem. 14. Convert 96.43lh to mUs. 15. Convert 0.021 F to uF. 16. Convert 38 500 N to RN. 1?. The speed of sound is approximately 1130 feet per second. State this in metres per minute. 13. Total energy consumption of an electric pump motor is 450 kW-h per 8 hour day. Determine the rate of energy consumption in [Enmm