A sharp knife can cut because the pressure increases when a) the surface of contact is small b) the surface of contact is large c) when we apply a large force on it regardless of the surface of contact d) both the surface of contact and the force are large

A differential equation encountered in the vibration of beams is d4ydx4=2D where x = distance measured along the beam; [x]=[L] y = displacement of the beam; [y]=[L] = circular frequency of vibration; []=[T1] = mass of the beam per unit length; []=[ML1] D = bending rigidity of beam; [D]=[FL2] Show that the equation is dimensionally homogeneous. Note that [F]=[MLT2] see Eq. (1.21:).

Specific heat is the amount of heat necessary to raise the temperature of 1 lb of a ______1F.

MDI stands for _________ ___________ ________.