1. electromagnetic radiation that people can see is known
as
2. objects that are
or illuminated c
a. objects that produce and give off their own light, such as
to be
b.
objects, such as the moon, g
not produce.
light bouncing of the surface of an object is called

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.

answer;

18.5 seconds

explanation;

velocity is distance covered per unit time; it is given by displacement divided by time.

thus; time = displacement/velocity

total time = total displacement/velocity

total distance = 5000 meters south

total time = 5000/4.5

                  = 1111.11 seconds

but; 1 minute = 60 sec

thus; 1111.11 /60

                = 18.51 seconds

thus; the time taken is 18.5 seconds