Question 14 (1 point) For a system that contains a rock falling through the air, which situation is always true?

The total mechanical energy of the system is conserved.

The total energy of the system is conserved.

The total potential energy of the system is conserved.

The total kinetic energy of the system is conserved.

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

Debris produced by mining is called

Preciso de ajuda na parte de termometria e tenho prova amanhã ajuda ae prf