Para determinarmos a polaridade da molécula devemos levar em conta, além da polaridade das ligações, sua geometria molecular, ou seja, seu arranjo espacial. Moléculas formadas por ligações polares podem ser apolares. Isso ocorre quando a soma dos vetores das ligações é igual a zero. *

given data:

determine the horse power (h.p) = ?

force applied to move the box(f) = 10 pounds,

box lifted from a distance         (d) = 3 feet

time taken to lift                         (t) = 10 sec,

the horse power is defined as amount of work required to move a load. the horse power is equal to 550 foot-pound per second

                  1 h.p   = 550 foot-pound/second

it can also be defined as the the load that need to be move a body for certain distance in a certain amount of time.

mathematically,

                      h.p = (force × distance)/ time

                            = (10 × 3)/ 10

                            = 30/10

                            = 3 foot -pound/sec

hence, the horse power is needed to move the box is 3 foot-pound/second

important note: 1 h.p = 550 foot-pound/second = 746 watts

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

f=ma newton

f=100x2.5=250n