Physical measurements

Which of the following is not a key element in the measurement process?

• Measuring tool

• Measuring unit

• Physical quantity

• Lab coat

Which of the following is not a derived quantity?

• Speed

• Density

• Mass

• Volume

While applying dimensional analysis, a physical relation was proven to be dimensionally correct (i.e. both equation sides are equal), so .....

• The relation must be correct indeed

• The relation must be wrong

• The relation may be correct

• Not enough information

In which metric system is the length measured in cm?

• British

• French

• Metric system

• None

....... is comparing an unknown to a known amount of its kind to see how much times the first contains the second.

• Physical quantity

• Physical measurement

• Measurement error

• Dimensional formula

Acceleration is a derived quantity formed by a mathematical relation between ............

• Length, length, and length

• Length, mass, and time

• Length and time

• Length, time, and time

What type of material was used to express the standard meter and the standard kilogram?

• Platinum metal

• Iridium metal

• Platinum-Iridium alloy

• Platinum-Titanium alloy

If you were to measure the thickness of a glass window, which tool would you use?

• Ruler

• Measuring tape

• Vernier scale

• None

Which type of error can give a hint about the measurement accuracy?

• Absolute error

• Relative error

• None

The dimensional formula of velocity is M⁰L¹T^-1, thus the unit that express velocity is ............

• Kg/m

• Kg/L

• m/s

• m/s²