- What are the applications of differentiation formulas in agricultural science?

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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? Chemistry Help. Identify the substance that is an ion.
a. HClO4 b. CaBr2 c. Br- d. SO2? If 1.18 L of water is initially at 21.1 ∘C, what will its temperature be after absorption of 9.4×10−2 kWh of heat? 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? What chemical can be used to waterproof Nylon 12?