Queremos subir un barril de 150 kg a la caja de un camión, que tiene 120 cm de altura, utilizando unos listones como rampa. ¿Qué longitud deben tener los listones para hacer una fuerza de 490 N?

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7