Aplane comes in for landing at a velocity of 80 meters per second west . as it touches down, it decelerates at a constant rate of 3 meters per second per second. what is the minimum length of runway needed for this plane to come to a complete stop ( on the runway)? a.) 240m. b.)682m c.) 859m. d.) 1067m

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2