How fast is it moving at the instant it reaches the top of its trajectory if the projectile is
fired upward at 31◦
from the horizontal?
Answer in units of m/s.

d eras and periods

d) physical means can be used to separate the components of air.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

statement #3 on andre"s list is false.