Compare the signs of ƒ for lenses and mirrors.

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.

Debris produced by mining is called

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.