. An analytical balance is used with brass weights. Find the mass of a body made of Plexiglas, whose two measurements result in a difference of at least one mark if one measurement is performed in dry weather and the other in wet weather? In both cases the room temperature is 23 C and the atmospherie pressure is 10 Pa. In wet weather the pressure of the water vapour in the air is 2 0 Pa. The sensitivity of the balance is 0.l mg/scalemark. ( e =8.5-10 kg/m: gPlexiglns = 1.18-10 kg/m".)

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. An analytical balance is used with brass weights. Find the mass of a
body made of Plexiglas, whose two measurements result in a difference of at least one
mark if one measurement is performed in dry weather and the other in wet weather? In
both cases the rom temperature is 23 °C' and the atmospherie pressure is 10% Pa. In
wet weather the pressure of the water vapour in the air is 2. 10 Pa. The sensitivity of
the balance is 0.l mg/scalemark. ( 9em =8.5-10* kg/m°; gplexiglas = 1.18-10* kg/m².)
3
Transcribed Image Text:. An analytical balance is used with brass weights. Find the mass of a body made of Plexiglas, whose two measurements result in a difference of at least one mark if one measurement is performed in dry weather and the other in wet weather? In both cases the rom temperature is 23 °C' and the atmospherie pressure is 10% Pa. In wet weather the pressure of the water vapour in the air is 2. 10 Pa. The sensitivity of the balance is 0.l mg/scalemark. ( 9em =8.5-10* kg/m°; gplexiglas = 1.18-10* kg/m².) 3
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