Discover Questions

An observer in a lighthouse 350 feet above see level observe two ship directly offshore. The angle of depression to the ship are 4° and 6.5°? Is there a way to imagine how fast the Earth is moving through space or how fast it is spinning? Which element would be expected to have chemical and physical properties closest to those of rubidium? Cu K S Fe Ca? For the curve given by
r(t)=⟨sin(t)−tcos(t),cos(t)+tsin(t),1t^2+5⟩
a. Find T(t)~the Unit tangent
b. N(t)~the unit normal
c. k(t)~curvature? A mix of He Ne & Ar has a pressure of 14.9atm at 28.0°C. the partial pressure of He=3.73atm & Ar=2.41atm, whats the partial pressure of Ne?