11. All food chains begin with which of the following?*
1 pc
O
O
a. A producer
b. A consumer
C. A small organism
D. A predator
12. Which of the following is the energy source for (almost) all life on earth? 1p

Help m

b. producer

Explanation:

u cant have a food chain with out the smallest part. in other words if a deer had no grass to eat it wouldn't be on the food chain because it didn't have grass, than the lion would then starve and slowly die out after the deer ext (you get it).

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

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.