# Measurement- Chapter No 1

Right Answers have been shown below in red color.

**1. The SI standard of time is based on:**

A) the daily rotation of the earthB) the frequency of light emitted by Kr^{86}C) the yearly revolution of the earth about the sunD) a precision pendulum clockE) none of these

**2. A nanosecond is:**

A) 10^{9}sB) 10^{−9}sC) 10^{−10}sD) 10^{−10}sE) 10^{−12}

**3. The SI standard of length is based on:**

A) the distance from the north pole to the equator along a meridian passing through ParisB) wavelength of light emitted by Hg198C) wavelength of light emitted by Kr86D) a precision meter stick in ParisE) the speed of light

**4. In 1866, the U. S. Congress defined the U. S. yard as exactly 3600/3937 international meter.****This was done primarily because:**

A) length can be measured more accurately in meters than in yardsB) the meter is more stable than the yardC) this definition relates the common U. S. length units to a more widely used systemD) there are more wavelengths in a yard than in a meterE) the members of this Congress were exceptionally intelligent

**5. Which of the following is closest to a yard in length?**

A) 0.01 mB) 0.1 mC) 1 mD) 100 mE) 1000 m

**6. There is no SI base unit for area because:**

A) an area has no thickness; hence no physical standard can be builtB) we live in a three (not a two) dimensional worldC) it is impossible to express square feet in terms of metersD) area can be expressed in terms of square metersE) area is not an important physical quantity

**7. The SI base unit for mass is:**

A) gramB) poundC) kilogramD) ounceE) kilopound

**8. A gram is:**

A) 10^{−6}kgB) 10^{−3}kgC) 1 kgD) 10^{3}kgE) 10^{6}kg

**9. Which of the following weighs about a pound?**

A) 0.05 kgB) 0.5 kgC) 5 kgD) 50 kgE) 500 kg

**10. (5.0 × 10 ^{4}) × (3.0 × 10^{6}) = ?**

A) 1.5 × 10^{9}B) 1.5 × 10^{10}C) 1.5 × 10^{11}D) 1.5 × 10^{12}E) 1.5 × 10^{13}

**11. (5.0 × 10 ^{4}) × (3.0 × 10^{-6}) = ?**

A) 1.5× 10^{−3}B) 1.5 × 10^{−1}C) 1.5 × 10^{1}D) 1.5 × 10^{3}E) 1.5 × 10^{5}

**12. 5.0 × 10 ^{5} + 3.0 × 10^{6} = ?**

A) 8.0 × 10^{5}B) 8.0 × 10^{6}C) 5.3 × 10^{7}D) 3.5 × 10^{8}E) 3.5 × 10^{6}

**13. (7.0 × 10 ^{6})/(2.0 × 10^{-6}) = ?**

A) 3.5 × 10^{-12}B) 3.5 × 10^{-6}C) 3.5D) 3.5 × 10^{6}E) 3.5 × 10^{12}

**14. The number of significant figures in 0.00150 is:**

A) 2B) 3C) 4D) 5E) 6

**15. The number of significant figures in 15.0 is:**

A) 1B) 2C) 3D) 4E) 5

**16. 3.2 × 2.7 = ?**

A) 9B) 8C) 8.6D) 8.64E) 8.640

**17. 1.513 + 27.3 = ?**

A) 29B) 28.8C) 28.9D) 28.81E) 28.813

**18. 1 mi is equivalent to 1609 m so 55 mph is:**

A) 15 m/sB) 25 m/sC) 66 m/sD) 88 m/sE) 1500 m/s

**19. A sphere with a radius of 1.7 cm has a volume of:**

**A) 2.1 × 10 ^{−5} m^{3}**

**B) 9.1 × 10**

^{−4}m^{3}**C) 3.6 × 10**

^{−3}m^{3}**D) 0.11 m**

^{3}**E) 21 m**

^{3}**20. A sphere with a radius of 1.7 cm has a surface area of:**

A) 2.1 × 10^{−5}m^{2}B) 9.1 × 10^{−4}m^{2}C) 3.6 × 10^{−3}m^{2}D) 0.11 m^{2}E) 36 m^{2}

**21. A right circular cylinder with a radius of 2.3 cm and a height of 1.4 m has a volume of:**

A) 0.20 m^{3}B) 0.14 m^{3}C) 9.3 × 10^{-3}m^{3}D) 2.3 × 10^{-3}m^{3}E) 7.4 × 10^{-4}m^{3}

**22. A right circular cylinder with a radius of 2.3 cm and a height of 1.4 cm has a total surface area****of:**

A) 1.7 × 10^{−3}m^{2}B) 3.2 × 10^{−3}m^{2}C) 2.0 × 10^{−3}m^{2}D) 5.3 × 10^{−3}m^{2}E) 7.4 × 10^{−3}m^{2}

**23. A cubic box with an edge of exactly 1 cm has a volume of:**

A) 10^{-9}m^{3}B) 10^{-6}m^{3}C) 10^{-3}m^{3}D) 10^{3}m^{3}E) 10^{6}m^{3}

**24. A square with an edge of exactly 1 cm has an area of:**

A) 10^{−6}m^{2}B) 10^{−4}m^{2}C) 10^{2}m^{2}D) 10^{4}m^{2}E) 10^{6}m^{2}

**25. 1 m is equivalent to 3.281 ft. A cube with an edge of 1.5 ft has a volume of:**

A) 1.2 × 10^{2}m^{3}B) 9.6 × 10^{-2}m^{3}C) 10.5 m^{3}D) 9.5 × 10^{-2}m^{3}E) 0.21 m^{3}

**26. Suppose A = BC, where A has the dimension L/M and C has the dimension L/T. Then B****has the dimension:**

A) T/MB) L^{2}/TMC) TM/L^{2}D) L^{2}T/ME) M/L^{2}T

**27. Suppose A = B ^{n}C^{m}, where A has dimensions LT, B has dimensions L^{2}T^{-1}, and C has**

**dimensions LT**

^{2}. Then the exponents n and m have the values:

A) 2/3; 1/3B) 2; 3C) 4/5; −1/5D) 1/5; 3/5E) 1/2; 1/2