Physics · Oct / Nov 2022 · Paper 42 · Question 1
0625
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Fig. 1.1 shows sea water flowing down a channel into a tank without splashing. The water is flowing at a rate of 800 kg / min. The length and width of the tank are 3.10 m and 1.20 m. The density of the sea water is 1020 kg / m3. 1.20 m 3.10 m channel flowing sea water tank Fig. 1.1 (not to scale)
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1(a)[3]
(depth =) 0.211 m
=m / V OR (V =) m / OR 800 / 1020
C1 V = l × w × d OR (d =) V / (l × w) OR V ÷ 3.72
C1
1(b)[3]
(∆GPE =) 56(.0) J
GPE = mg∆h OR (GPE =) mg∆h OR (800 / 60) × 10 × 0.42(0)
C1 (mass per second =) 800 / 60 (kg) OR their GPE per minute ÷ 60
C1
1(c)[3]
(P =) 8200 Pa
(P =) hg
C1 (P =) 1020 × 10 × 0.8(00) (Pa)
C1 OR
(P =) F / A
(C1) F = mg OR
(C1) F = 1020 × 0.8(00) × 3.72 × 10
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