The density of nickel is $8900 \mathrm{kg}/{\mathrm{m}}^3$. Find the density of nickel in $\mathrm{g}/{\mathrm{cm}}^3$. [Enter the value excluding units]

Platinum has a density of $21450 \mathrm{kg}/{\mathrm{m}}^3$. Gold has a density of $19.32 \mathrm{g}/{\mathrm{cm}}^3$. Determine which metal is denser.

A car travels at $20 \mathrm{m}/\mathrm{s}$ in a village where the speed limit is $50 \mathrm{km}/\mathrm{h}$. Determine if the car is exceeding the speed limit.

A top speed of $231.523 \mathrm{mph}$(miles per hour) was set by a formula $1$ racing car in $2005$. A Chinook helicopter has a maximum speed of $87.5 \mathrm{m}/\mathrm{s}$ (meters per second).

Determine which is faster.