1 Write the following using base units only without the use

1.- Write the following using base units only without the use of prefix:

23.2 kN.s/nm

Remember that base units are: m, K, s, A, kg, cd, mol.

2.- Express the following conversion to three significant digits

265 mph to km/s

3.- Write the following using base units only without the use of prefix:

4.53 x 10^-8 Mg/(cm².s).

Remember that base units are: m, K, s, A, kg, cd, mol.

4.- Express the following conversion to three significant digits

27 549 watts to BTU/s

Solution

1.

23.2 kN.s/nm=23.2*10^3 ((kg m/s^2).s)/(10^{-9} m)=23.2*10^{12} kg/s

2.

265 mph =265 (1.6 km)/(3600 s)=0.118 km/s

3.

4.53*10^{-8} Mg/(cm^2.s)=4.53*10^{-8} (10^3 kg)/((10^-2 m)^2/s)

                                            =4.53*10^{-1} kg/(m^2.s)

4.

1 W is equal to 3.412142 BTU/hr

27549 Watt = 27549*3.412142 BTU/hr = 27549*3.412142 BTU/(3600 s)=7.65 BTU/s