Comparing independent decays: simulations of the r-process suggest 1.35 nuclei of u were produced for every 1 nucleus of u in the supernova explosions that made the 235 238 particles that formed earth. the current relative abundances on earth are 0.7 and 99.3 percent, and the half lives are 7.0x10 y and 4.5x10 y, respectively how long ago were those uranium isotopes made? (yes, they're really from several different supernovae, but simplified for the problem. also, they were floating around for a while before earth was formed, so don't just write the age of earth.)

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

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.