Question

1. 0.74 kcal/min to cal/sec
2. 1.42 g/cm to mg/mm
3. 10095 m/s to miles/s
4. 9.81 m/s² to ft/s²
5. 8.41 g/ml to kg/l
6. 3.8 km/sec to miles/year
7. 7.68 cal/sec to kcal/min
8. 8.24 g/cm to mg/mm
9. 25 m/s to miles/hr

Explanation:

12. Convert 0.74 Kcal/min to cal/sec

Step1: Convert Kcal to cal

1 Kcal = 1000 cal, so 0.74 Kcal = 0.74×1000 = 740 cal.

Step2: Convert minutes to seconds

1 min = 60 sec.

Step3: Calculate the result

The rate in cal/sec is $\frac{740}{60}\approx12.33$ cal/sec.

Step1: Convert grams to milligrams

1 g = 1000 mg, so 1.42 g = 1.42×1000 = 1420 mg.

Step2: Convert centimeters to millimeters

1 cm = 10 mm.

Step3: Calculate the result

The density in mg/mm is $\frac{1420}{10}=142$ mg/mm.

Step1: Use the conversion factor

1 mile = 1609.34 m.

Step2: Calculate the result

The speed in miles/s is $\frac{10095}{1609.34}\approx6.27$ miles/s.

Answer:

12.33 cal/sec

13. Convert 1.42 g/cm to mg/mm