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For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Which one of the following research methods can show cause and effect

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending