Practice with Density Please choose the correct answer.
A piece of metal has a mass of 8.0 g
and a volume of 1.4 cm? What is
the density of this metal?
0.089 g/cm
O 0.17 g/cm3
5.7 g/cm3
O 11 g/cm

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

What is the momentum of a 47-gram tennis ball that is traveling at 40 m/s

·sound · parallel · mechanical · not a vacuum · needs a medium · compressions and rarefaction what type of wave is being described? a) compaction b) electromagnetic c) longitudinal d) transverse