Engineering Your Future
Engineering Your Future
9th Edition
ISBN: 9780190279264
Author: William C. Oakes, Les L. Leone
Publisher: Oxford University Press, USA
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Chapter 15, Problem 15.18EAA
To determine

a.

By expressing the following conversion to 4 significant digits.

Expert Solution
Check Mark

Answer to Problem 15.18EAA

35.87×104watts.

Explanation of Solution

Given Information:

340Btusto watts.

We know,

1Btus=1055.055watts.

Therefore,

340Btus=358718.7watts.

Converting to 4 digits we get,

340Btus=35.87×104watts ……………………………… (Equation (1))

Conclusion:

Equation 1 provides the required conversion in 4 significant digits.

b.

By expressing the following conversion to 4 significant digits.

60.35radians.

Given Information:

3458degrees to radians.

We know,

1degree=0.017453radians.

Therefore,

3458degrees=60.35radians ……………………………… (Equation (2))

Conclusion:

Equation 2 provides the required conversion in 4 significant digits.

c.

By expressing the following conversion to 4 significant digits.

2500×102squaremeters.

Given Information:

25hectares to squaremeters.

We know,

1hectare=10000squaremeters.

Therefore,

25hectares=250000squaremeters.

Converting to 4 digits we get,

25hectares=2500×102squaremeters ……………………………… (Equation (3))

Conclusion:

Equation 3 provides the required conversion in 4 significant digits.

d.

By expressing the following conversion to 4 significant digits.

17.90×104watts.

Given Information:

240horsepower to watts.

We know,

1horsepower=745.7watts.

Therefore,

240horsepower=178968watts.

Converting to 4 digits we get,

240horsepower=17.90×104watts ……………………………… (Equation (4))

Conclusion:

Equation 4 provides the required conversion in 4 significant digits.

e.

By expressing the following conversion to 4 significant digits.

2.442×1011joules.

Given Information:

67851.22kwh(kilowatthour) to joules.

We know,

1kwh(kilowatthour)=3600000joules.

Therefore,

67851.22kwh(kilowatthour)=2.442×1011joules ……………………………… (Equation (5))

Conclusion:

Equation 5 provides the required conversion in 4 significant digits.

f.

By expressing the following conversion to 4 significant digits.

3.218×10-4meters.

Given Information:

2×107miles to meters.

We know,

1mile=1609.34meters.

Therefore,

2×107miles=0.00032187meters.

Converting to 4 digits we get,

2×107miles=3.218×10-4meters ……………………………… (Equation (5))

Conclusion:

Equation 5 provides the required conversion in 4 significant digits.

g.

By expressing the following conversion to 4 significant digits.

1.788×10-2km/s.

Given Information:

40mph to km/s.

We know,

1mph=0.000447km/s.

Therefore,

40mph=0.01788km/s.

Converting to 4 digits we get,

40mph=1.788×10-2km/s ……………………………… (Equation (6))

Conclusion:

Equation 6 provides the required conversion in 4 significant digits.

To determine

b.

By expressing the following conversion to 4 significant digits.

Expert Solution
Check Mark

Answer to Problem 15.18EAA

60.35radians.

Explanation of Solution

Given Information:

3458degrees to radians.

We know,

1degree=0.017453radians.

Therefore,

3458degrees=60.35radians ……………………………… (Equation (2))

Conclusion:

Equation 2 provides the required conversion in 4 significant digits.

c.

By expressing the following conversion to 4 significant digits.

2500×102squaremeters.

Given Information:

25hectares to squaremeters.

We know,

1hectare=10000squaremeters.

Therefore,

25hectares=250000squaremeters.

Converting to 4 digits we get,

25hectares=2500×102squaremeters ……………………………… (Equation (3))

Conclusion:

Equation 3 provides the required conversion in 4 significant digits.

d.

By expressing the following conversion to 4 significant digits.

17.90×104watts.

Given Information:

240horsepower to watts.

We know,

1horsepower=745.7watts.

Therefore,

240horsepower=178968watts.

Converting to 4 digits we get,

240horsepower=17.90×104watts ……………………………… (Equation (4))

Conclusion:

Equation 4 provides the required conversion in 4 significant digits.

e.

By expressing the following conversion to 4 significant digits.

2.442×1011joules.

Given Information:

67851.22kwh(kilowatthour) to joules.

We know,

1kwh(kilowatthour)=3600000joules.

Therefore,

67851.22kwh(kilowatthour)=2.442×1011joules ……………………………… (Equation (5))

Conclusion:

Equation 5 provides the required conversion in 4 significant digits.

f.

By expressing the following conversion to 4 significant digits.

3.218×10-4meters.

Given Information:

2×107miles to meters.

We know,

1mile=1609.34meters.

Therefore,

2×107miles=0.00032187meters.

Converting to 4 digits we get,

2×107miles=3.218×10-4meters ……………………………… (Equation (5))

Conclusion:

Equation 5 provides the required conversion in 4 significant digits.

g.

By expressing the following conversion to 4 significant digits.

1.788×10-2km/s.

Given Information:

40mph to km/s.

We know,

1mph=0.000447km/s.

Therefore,

40mph=0.01788km/s.

Converting to 4 digits we get,

40mph=1.788×10-2km/s ……………………………… (Equation (6))

Conclusion:

Equation 6 provides the required conversion in 4 significant digits.

To determine

c.

By expressing the following conversion to 4 significant digits.

Expert Solution
Check Mark

Answer to Problem 15.18EAA

2500×102squaremeters.

Explanation of Solution

Given Information:

25hectares to squaremeters.

We know,

1hectare=10000squaremeters.

Therefore,

25hectares=250000squaremeters.

Converting to 4 digits we get,

25hectares=2500×102squaremeters ……………………………… (Equation (3))

Conclusion:

Equation 3 provides the required conversion in 4 significant digits.

d.

By expressing the following conversion to 4 significant digits.

17.90×104watts.

Given Information:

240horsepower to watts.

We know,

1horsepower=745.7watts.

Therefore,

240horsepower=178968watts.

Converting to 4 digits we get,

240horsepower=17.90×104watts ……………………………… (Equation (4))

Conclusion:

Equation 4 provides the required conversion in 4 significant digits.

e.

By expressing the following conversion to 4 significant digits.

2.442×1011joules.

Given Information:

67851.22kwh(kilowatthour) to joules.

We know,

1kwh(kilowatthour)=3600000joules.

Therefore,

67851.22kwh(kilowatthour)=2.442×1011joules ……………………………… (Equation (5))

Conclusion:

Equation 5 provides the required conversion in 4 significant digits.

f.

By expressing the following conversion to 4 significant digits.

3.218×10-4meters.

Given Information:

2×107miles to meters.

We know,

1mile=1609.34meters.

Therefore,

2×107miles=0.00032187meters.

Converting to 4 digits we get,

2×107miles=3.218×10-4meters ……………………………… (Equation (5))

Conclusion:

Equation 5 provides the required conversion in 4 significant digits.

g.

By expressing the following conversion to 4 significant digits.

1.788×10-2km/s.

Given Information:

40mph to km/s.

We know,

1mph=0.000447km/s.

Therefore,

40mph=0.01788km/s.

Converting to 4 digits we get,

40mph=1.788×10-2km/s ……………………………… (Equation (6))

Conclusion:

Equation 6 provides the required conversion in 4 significant digits.

To determine

d.

By expressing the following conversion to 4 significant digits.

Expert Solution
Check Mark

Answer to Problem 15.18EAA

17.90×104watts.

Explanation of Solution

Given Information:

240horsepower to watts.

We know,

1horsepower=745.7watts.

Therefore,

240horsepower=178968watts.

Converting to 4 digits we get,

240horsepower=17.90×104watts ……………………………… (Equation (4))

Conclusion:

Equation 4 provides the required conversion in 4 significant digits.

e.

By expressing the following conversion to 4 significant digits.

2.442×1011joules.

Given Information:

67851.22kwh(kilowatthour) to joules.

We know,

1kwh(kilowatthour)=3600000joules.

Therefore,

67851.22kwh(kilowatthour)=2.442×1011joules ……………………………… (Equation (5))

Conclusion:

Equation 5 provides the required conversion in 4 significant digits.

f.

By expressing the following conversion to 4 significant digits.

3.218×10-4meters.

Given Information:

2×107miles to meters.

We know,

1mile=1609.34meters.

Therefore,

2×107miles=0.00032187meters.

Converting to 4 digits we get,

2×107miles=3.218×10-4meters ……………………………… (Equation (5))

Conclusion:

Equation 5 provides the required conversion in 4 significant digits.

g.

By expressing the following conversion to 4 significant digits.

1.788×10-2km/s.

Given Information:

40mph to km/s.

We know,

1mph=0.000447km/s.

Therefore,

40mph=0.01788km/s.

Converting to 4 digits we get,

40mph=1.788×10-2km/s ……………………………… (Equation (6))

Conclusion:

Equation 6 provides the required conversion in 4 significant digits.

To determine

e.

By expressing the following conversion to 4 significant digits.

Expert Solution
Check Mark

Answer to Problem 15.18EAA

2.442×1011joules.

Explanation of Solution

Given Information:

67851.22kwh(kilowatthour) to joules.

We know,

1kwh(kilowatthour)=3600000joules.

Therefore,

67851.22kwh(kilowatthour)=2.442×1011joules ……………………………… (Equation (5))

Conclusion:

Equation 5 provides the required conversion in 4 significant digits.

f.

By expressing the following conversion to 4 significant digits.

3.218×10-4meters.

Given Information:

2×107miles to meters.

We know,

1mile=1609.34meters.

Therefore,

2×107miles=0.00032187meters.

Converting to 4 digits we get,

2×107miles=3.218×10-4meters ……………………………… (Equation (5))

Conclusion:

Equation 5 provides the required conversion in 4 significant digits.

g.

By expressing the following conversion to 4 significant digits.

1.788×10-2km/s.

Given Information:

40mph to km/s.

We know,

1mph=0.000447km/s.

Therefore,

40mph=0.01788km/s.

Converting to 4 digits we get,

40mph=1.788×10-2km/s ……………………………… (Equation (6))

Conclusion:

Equation 6 provides the required conversion in 4 significant digits.

To determine

f.

By expressing the following conversion to 4 significant digits.

Expert Solution
Check Mark

Answer to Problem 15.18EAA

3.218×10-4meters.

Explanation of Solution

Given Information:

2×107miles to meters.

We know,

1mile=1609.34meters.

Therefore,

2×107miles=0.00032187meters.

Converting to 4 digits we get,

2×107miles=3.218×10-4meters ……………………………… (Equation (5))

Conclusion:

Equation 5 provides the required conversion in 4 significant digits.

g.

By expressing the following conversion to 4 significant digits.

1.788×10-2km/s.

Given Information:

40mph to km/s.

We know,

1mph=0.000447km/s.

Therefore,

40mph=0.01788km/s.

Converting to 4 digits we get,

40mph=1.788×10-2km/s ……………………………… (Equation (6))

Conclusion:

Equation 6 provides the required conversion in 4 significant digits.

To determine

g.

By expressing the following conversion to 4 significant digits.

Expert Solution
Check Mark

Answer to Problem 15.18EAA

1.788×10-2km/s.

Explanation of Solution

Given Information:

40mph to km/s.

We know,

1mph=0.000447km/s.

Therefore,

40mph=0.01788km/s.

Converting to 4 digits we get,

40mph=1.788×10-2km/s ……………………………… (Equation (6))

Conclusion:

Equation 6 provides the required conversion in 4 significant digits.

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