Please help ! A position versus time graph is shown below.

Use the graph to determine the instantaneous velocity in m/s of the object at 7.0 seconds?

a. 0 m/s
b. 1.4 m/s
c. 7 m/s
d. 10 m/s

The softest and hardest minerals are: softest hardest

Atomic nuclei of almost all elements consist of

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.