Consider one-dimensional isentropic flow at a Mach number of $0.5 .$ If the area of cross-section of a streamtube increases by $3 \%$ somewhere along the flow, the corresponding percentage change in density is________________

Consider one-dimensional isentropic flow at a Mach number of $0.5 .$ If the area of cross-section of a streamtube increases by $3 \%$ somewhere along the flow, the corresponding percentage change in density is________________

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