Question 1

How many km/h is 1 mph?

Accepted Answer

1 mile per hour equals approximately 1.60934 km/h.

Question 2

What is a knot?

Accepted Answer

A knot is a unit of speed equal to 1 nautical mile per hour, approximately 1.852 km/h.

Question 3

What is Mach 1?

Accepted Answer

Mach 1 equals the speed of sound, approximately 340.29 m/s (1,225 km/h) at sea level and 15 °C. The exact value varies with temperature and altitude.

Question 4

What is a furlong per fortnight?

Accepted Answer

A furlong per fortnight equals approximately 0.000166 m/s. It is a humorous unit sometimes used in teaching to illustrate unit conversion. One furlong is 201.168 m and a fortnight is 14 days.

Speed of light to Mach

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