calculate image scale of a telescope with a diameter 500nm and focal ratio of 5; give answer in arcsec per mm.

What is the role of the ocular lens?

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.

Place me with this question is my last question