Can you please help me with these Q2. If you increase the length of a rod by a f

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Can you please help me with these

Q2. If you increase the length of a rod by a factor of 2 but decrease the radius by a factor of 0.2, by what factor does the volume of the rod change?

Q3. Given a rod of a known density 9.07 g/Cm^3 a mass of 472 grams, and a length of 1.6 meters, what is the radius of the rod in mm?

Q4.You make four different measurements with four different precision instruments, and you get the following results: 33.56 cm with an instrument of 0.01 cm precision, 1.256 mm with 0.001mm precision, 12.5 microns with 0.1 micron precision, and 201 grams with 1 gram precision. Which measurement has the least percent uncertainty?

a. The 0.1 micron precision instrument

b. The 0.01 cm precision instrument

c. The 1 gram precision instrument

d. 0.001 mm precision instrument

Q5. Most micrometers have certain zero offset, which can be either positive or negative. For the micrometer shown below, what is its zero offset (in unit of mm)?

a. -0.05

b. 0.007

c. 0.05

d. 5

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?

Metal g/cm^3 Aluminum 2.70 Iron 7.87 Copper 8.96 Gold 19.32 QUESTION 1 Let a represent length, B represents radius, and Y represent mass of a metal rod. Which of the following is a correct representation ofthe density formula then? orTTB

Explanation / Answer

Ans(1)= by dimensional analysis density=ML^-3

Gamma is representing M and alpha and beta from above data are representing L and pi is dimensionless

From above given option option C has same dimension as density I. E. M/L3=ML^-3

So the answer is (C)

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