Question 6 Write down the symbol for increase the symbol for decrease and the

Question 6 write down the symbol for increase the

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Question 6: Write down the symbol ‘+’ for increase, the symbol ‘–’ for decrease and the symbol ‘0’ for no change, 0 ; + + + 0 + + 0 i) ii) iii)
CIE A2-LEVEL PHYSICS//9702 P AGE 9 OF 37 Question 2: Some water in a saucepan is boiling. a)Explain why: i.external work is done by the boiling water ∆= ² g z + g { b) By reference to the first law and your answer in (a), show that thermal energy must be supplied to the water during the boiling process ∆= ² x + y Changing from a liquid to a gas, there is an increase in internal energy. Work is done by the liquid so y is negative. For ∆= to be positive, x must increase. 6. O SCILLATIONS 6.1 Describing Oscillations Displacement #|\$ : instantaneous distance of the moving object from its mean position Amplitude #}\$ : maximum displacement from the mean position Period #~\$ : time taken for one complete oscillation Frequency # \$ : number of oscillations per unit time Angular frequency # \$ : rate of change of angular displacement µ ² 2·¹ Phase difference # \$:measure of how much one wave is out of step with another wave