6.27 ($6.13) show that angles between vectors and ratios of lengths of vectors, but not lengths, are the same for conform- ally related metrics.

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.

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25? , b) el tiempo que el balón permanece en el aire.

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.