Question

A.7.2. Apply (APPENDIX A pp. 878).

A1. Convert the values on the left to the units at right, using a table of conversions. a. 50 miles =? km b. 15 knots = ? m s–1 c. 30 lb in–2 =? kPa d. 5000 kW =? horsepower e. 150 lbMass =? kg f. 150 lbForce =? N g. 12 ft = ? m h. 50 km h–1 = ? m s–1

Answer 1

a) 80 km

b) 7.65 m/s

c) 206.7 kPa

d) 6700 horsepower

e) 67.3 kg

f) 666 N

g) 3.6 m

h) 13.88 m/s

Step-by-step explanation:

a. we know that 1 mile = 1.6 km

`50 miles = (50 * 1.6) km = 80 km`

b. we know that 1 knot = 0.51 m/s

`15 knots = (15 * 0.51) m/s = 7.65 m/s`

c. we knwo that 1 lb/inch^2 = 6.89 kPa

`30 lb/inch2 = (30 * 6.89) kPa = 206.7 kPa</p><p>`

d. we know that 1 kilowatt = 1.34 horsepower

`5000 kW = (5000 * 1.34) horsepower = 6700 horsepower`

e. we know that 1 lbMass = 0.45 kg

`150 lb = (150 * 0.45) kg = 67.3 kg`

f. we know that 1 lbForce = 4.44 N

`150 lbf = (150 * 4.44) N = 666 N`

g. we know that 1 ft = 0.3 m

`12 ft = (12* 0.3) m = 3.6 m`

h. we know that 1 km/h = 0.27 m/s

`50 km/h = (50* 0.27) m/s = 13.88 m/s`