A block of unknown metal has the following dimensions: 1cm× 1cm×3cm. The block's mass is 27g. What is the density of the block? O a. 900/m3 O b. gke/m 3 O .90*E/m 3 O d. 9000kE/m 3

A block of unknown metal has the following dimensions: 1cm× 1cm×3cm. The block's density is 80o09/m³. What is the mass of the block? O a. 24kg O b. 24g O . 240g O d. 2.4kg

4. Air (p= 1.21 kg m³ and μ = 1.823×10-5 kg m-¹ s-¹) is flowing past a flat plate at 30 m s-¹. The plate is 1.0 m in length. Calculate the shear stress at a distance of 0.15 m and 0.9 m from the leading edge of the plate. [Ans. 0.644 and 1.78 N m²]

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