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8 Energy – forces doing work

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Question 51
F

The table shows changes in three energy stores in a closed system. These are the only stores that change.

Energy storeChange
ChemicalDecreases by 420 J
KineticIncreases by 150 J
ThermalIncreases by XXX

Which gives X X\,X and the change in the total energy of the system?

[1]
A

X=570 JX=570\ \mathrm{J}X=570 J; total change 0 J0\ \mathrm{J}0 J

B

X=270 JX=270\ \mathrm{J}X=270 J; total change 0 J0\ \mathrm{J}0 J

C

X=270 JX=270\ \mathrm{J}X=270 J; total change 420 J420\ \mathrm{J}420 J

D

X=570 JX=570\ \mathrm{J}X=570 J; total change 420 J420\ \mathrm{J}420 J

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8 Energy – forces doing work Questions

  1. GCSE
  2. /Physics
  3. /8 Energy – forces doing work

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