En una fiesta con tus amigos deciden pedir comida a domicilio, tu comes una hamburguesa (600 Cal), una porción de papas fritas (400 Cal), un pedazo de pizza (360 Cal) y 2 gaseosas (200 Cal cada una).
Recuerda que 1 Cal = 1000 cal y 1 cal = 4.184 J. Haz tu cuenta de cuantas calorías te comiste y para
perderlas determina ¿Cuánto tiempo de cada ejercicio debes hacer si pierdes por hora lo indicado en el
listado?
a. Natación 700 cal
b. Aerobics 480 cal
c. Remo 840 cal
d. Correr (8.5 km/h) 600 cal
e. Ciclismo (19 km/h) 600 cal
f. Caminar en competencia (8.5 km/h) 650 cal
g. Caminar 300 cal
h. Bajando escaleras 364 cal
i. Subiendo escaleras 1000 cal

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).