Measurement & Quantities

Which group of quantities consists entirely of base quantities?

The SI unit of length is the ...

The most appropriate instrument to measure the inner diameter of a small pipe is ...

The number of significant figures in $0.00450$ is ...

Which of the following is a derived quantity?

The number $0.00032$ written in scientific notation is ...

A speed of $72\text{km/h}$ expressed in $\text{m/s}$ is ...

A vernier caliper reads a main scale of $2.4\text{cm}$ and a vernier scale of $0.06\text{cm}$. The measurement result is ...

The sum $12.5\text{g}+3.24\text{g}$ according to significant-figure rules is ...

A micrometer screw gauge shows a main scale of $3.5\text{mm}$ and a thimble scale of $0.22\text{mm}$. The measurement result is ...

An example of a vector quantity is ...

The dimension of velocity is ...

The precision of a vernier caliper is ...

Repeated measurements give $2.10\text{cm}$; $2.12\text{cm}$; $2.11\text{cm}$; and $2.11\text{cm}$. The average value is ...

A physics equation is written $s=ka{t}^2$ with $s$ distance, $a$ acceleration, and $t$ time. For the equation to be dimensionally correct, $k$ must ...

Measuring a ball's diameter with a vernier caliper gives a main scale of $4.2\text{cm}$ and the 4th vernier line aligned. If the precision is $0.01\text{cm}$, the diameter is ...

The product $(2\times 10^3)\times (4\times 10^{-5})$ is ...

A wire length is measured as $2.50\text{cm}$. The correct statement about this result is ...

A micrometer's main scale reads $5.5\text{mm}$ and its thimble is at 30 with a precision of $0.01\text{mm}$. The measurement result is ...

The drag force on an object moving in a fluid is $F=k\eta rv$, where $\eta$ is viscosity, $r$ radius, and $v$ velocity. The dimension of $\eta$ is ...