Four objects are situated along the y axis as follows: a1.96 kg object is at +2.90 m, a 2.98 kgobject is at +2.46 m, a 2.60 kg object is at the origin, and a3.99 kg object is at -0.503 m. Where is the center of mass of theseobjects?
x = m
y = m

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.

How many dots must be added to the symbol to properly represent a standard nitrogen ion? a) 1 b) 3 c) 5 d) 8

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?