Engr10 Using Units HomeWork Introduction to Engineering



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Unit Conversions


Please use these unit-equivalence factors to complete the unit-conversion exercises below.

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1 mile = 5280 feet

1 Btu = 1054.4 Joule

1 hour = 60 min

1 meter = 3.281 feet

1 Watt = 1 Joule/sec

1 min = 60 sec

1 foot = 12 inches

1 HorsePower = 2545 Btu/hr

1 gallon = 3.785 liters

1 yard = 3 feet

1 km = 1000 meters

1 ft3 = 7.4805 gallons

1 lb = 4.448 Newtons

1 furlong = 220 yards

1 Pascal = 1 Newton/m2

1 m2 = 1973.5 Circular inches

°F = 1.8x°C + 32

1 HorsePower = 550 ft-lb/s

1 cup = 48 TeaSpoon

1 Acre = 43,560 ft2

1 lb = 16 ounces

$1 = 0.787 €

$1 = 16,030 Viet Nam Dong

$1 = 10.825 Mexican Pesos




  1. (4 Points) RACE CAR SPEED. In 1990 Arie Luyendyk, driving for Douglas Shierson Racing, won the Indianapolis 500 mile automobile race in a time of 2 hours, 41 minutes and 18.404 seconds (2h:41m:18.404s) What was Luyendyk’s average speed for the 1990 “Indy 500” in Miles per Hour?



  1. (3 Points) RACE CAR SPEED. With reference to problem-1, What was Luyendyk’s average speed for the 1990 “Indy 500” in Meters per Second?



  1. (4 Points) RACE CAR POWER. IndyCar Series engines are rev-limited to 10,300 rpm and produce approximately 650 HorsePower (650 hp). What is the IndyCar Power-Output in kiloWatts (kW)




  1. (4 Points) HAIR DRYER POWER. The Power Rating of personal Hair Dryer is 1875 Watts. What is the equivalent heating power in Btu/Hr?




  1. (3 Points) SOCCER FIELD AREA: By FIFA rules the Largest possible regulation soccer field measures 90 meters wide by 120 meters long. How many

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