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4 years ago

10

A ping pong ball with a dent in it can be put into a pan of boiling water. After a short amount of time, the dent will pop out.

Determine the best reason for this occurrence.

2 answers:

kifflom [539]4 years ago

6 0

heat from water goes into air in ball

air expands

ping goes the dent

snow_lady [41]4 years ago

5 0

heat from water goes into air in ball

air expands

ping goes the dent

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To solve the question, we list out the varibles

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For balance between Tension and mass of rock is gigen by

∑Forces = 0, T - m×g×cosθ = 0

or T = m×g×cosθ = 0.12×9.81×cos45 = 0.83 N

c) The tension in the string as it passes through the vertical

when passing through the vertical we have T - m×g = (m×v²)/r

or T = m×g + (m×v²)/r = mg(1+2(1-cosθ)) =0.981*0.12 (1+ 2(1-cos45)) =1.867 N

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