The quadratic function h (1) = -16x2 +100% +10 models the height above the ground h, in feet, of a projectile x seconds after it had been launched vertically. What does the value of 10 represent in the problem? A The time at which the projectile reaches its maximum height B The time at which the projectile hits the ground The maximum height of the projectile D The initial height of the projectile​

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.