1 Slowly lift one foot at a time off the ground for a single leg plank. 2  Slowly reach one arm out in front of you, then return it to the floor for a single arm plank. 3  Repeat with the other arm and continue to alternate. 4  Make sure your hips remain stable and donât rock from side to side.
A distance of one international mile or 1 760 international yards or exactly 1609.344 meters travelled in one hour or exactly 3 600 seconds. 1 Mile per hour = 1.60934 kilometers per hour = 0.44704 meters per second (SI base unit). 1 mph = 0.447 04 m/s. 1 Mach Number: The ratio of the speed of an object moving through a fluid to the speed of sound in the same fluid. Under standard conditions at sea level this is roughly 340.29 meters per second for travel through air.
MACH TO SPEED OF LIGHT [VACUUM] (ma TO c) FORMULA. To convert between Mach and Speed Of Light [vacuum] you have to do the following: First divide 340.29 / 299792458 = 0.00000114. Then multiply the amount of Mach you want to convert to Speed Of Light [vacuum], use the chart below to guide you. 1 mach in speed of light [vacuum] = 0.00000114 ma. 10 mach in speed of light [vacuum] = 0.00001135 ma. 50 mach in speed of light [vacuum] = 0.00005675 ma.