Can you please help me with these Q6. You measured a rod to be 4.29 meters long

Question

Can you please help me with these

Q6. You measured a rod to be 4.29 meters long and 2.25 mm in diameter, what is the volume of the said rod in cm^3?

Q7. You made some measurements for an unknown rod, and obtained a length of 1.35 meters, a mass of 250 grams, and radius 2.57 mm. Which metal is the rod most likely made of based on the table below for known metal densitites?

a. Aluminum

b. Iron

c. copper

d. Gold

Q8. You've found the following measurements for a metal rod: length = 1.1 meters, diameter = 29.2 mm, and mass = 0.461 kg. Based on these measurements, what is the density of the rod in g/cm^3?

Explanation / Answer

6)

volume of rod = pi x radius^2 x height

v = pi x [(2.25 x 10^-3) / 2 ]^2 x 4.29

v = 0.0000171 m^3

v = 17.1 cm^3

7)

density = mass / volume

volume of rod = pi x radius^2 x height

v = pi x (2.57 x 10^-3)^2 x 1.35

v = 0.000028 m^3

v = 28 cm^3

density = 250 g / 28 cm^3

density = 8.93 g / cm^3

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