Until recent times, astronomers had to await a total solar eclipse to study the chromosphere. Why do suppose you cannot hold a coin in front of you to cover the solar disk and create an artificial eclipse that will permit you to study the chromosphere?

What are the factors that affect the resistance of a wire?

Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false

Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel