Twin sisters, gwen and jackie, were both 20 years old in the year 2000. jackie took off on a round trip to vega, 25 light-years away. she traveled at an average speed very close to the speed of light—say, 0.c.
which of the following best describes the situation according to jackie?
a. she stays still, while earth rushes away from her at 0.c and vega rushes toward her at 0.c. since vega is 25 light-years away, she says it takes vega about 25 years to reach her.
b. she stays still, while earth rushes away from her at 0.c and vega rushes toward her at 0.c. she sees the distance from earth to vega shortened considerably from 25 light-years, and therefore it takes far less than 25 years for vega to reach her.
c. she says that the 25-light-year trip takes only a few months and therefore concludes that she is traveling faster than the speed of light.
d. she's taking a trip that takes 25 years from earth to vega.

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

less than one you can't create energy

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is

the components of a vector are the parts of the vectors that are to each other.

b perpendicular