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4. Perform the following calculations, and express the answer in the correct units and number of significant figures.

7.945 J + 82.3 J - 0.02 J


0.0012 m - 0.000 45 m - 0.000 11 m


500 g + 432 g + 2 g

Respuesta :

ajinems

  • 90.225J

  • 90.225J56.0012m

  • 90.225J56.0012m934g

Calculation of the given expressions

  • 7.945 J + 82.3 J - 0.02 J

The rule of BODMAS should be obeyed, thus

= (7.945 J + 82.3 J) - 0.02 J

= 90.245 J - 0.02 J

= 90.225J

  • 0.0012 m - 0.000 45 m - 0.000 11 m

= 56.0012m

500 g + 432 g + 2 g

= 934g

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