A shopping cart is initially at rest when it undergoes a constant acceleration. After 3.0 s, the cart has undergone a displacement of 15 m. What is the cart's
acceleration?

A.3.3 m/s2
B.0.83 m/s2
C.2.2 m/s2
D.68 m/s2

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

Asynthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 75.5 psi and standard deviation 3.5 psi. how is the standard deviation of the sample mean changed when the sample size is increased from n equals 8 to n equals 47

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.