Problem: Express each quantity with the prefix given:
- a force of 0.0045 MN, in kN;
- a length of 3 250 000 mm, in km;
- a thickness of 0.00082 m, in μm.
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Problem: Express each quantity with the prefix given:
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How force, mass and length units fit together through F = ma, how to convert between SI and U.S. units, and how to write SI correctly.

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Convert forces between newtons, kilonewtons, pound-force, kips, kilogram-force and more, with exact factors and the conversion steps shown.

Convert areas between mm², cm², m², in², ft², acres, hectares and more, with exact factors and the conversion steps shown.

Convert volumes between mL, liters, m³, in³, ft³, U.S. and imperial gallons and more, with exact factors and the conversion steps shown.

Convert moments and torques between N·m, N·mm, kN·m, lbf·in, lbf·ft, kip·ft, kgf·m and more, with exact factors and the steps shown.

Convert time between nanoseconds, seconds, minutes, hours, days, weeks and years, or split a duration into hours, minutes and seconds.

Convert temperatures between °C, °F, K and °R, and temperature differences without the offset, with the formulas shown step by step.

Convert the second moment of area (mm⁴, cm⁴, in⁴, ft⁴) and the mass moment of inertia (kg·m², lb·ft², slug·ft²) with exact factors and steps.
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