Astationary bomb explodes in gravity-free space breaking into a number of small fragments. which one of the following statements concerning this event is true? a. kinetic energy is conserved in this process. b. the fragments have equal kinetic energies. c. the sum of the kinetic energies of the fragments must be zero. d. the vector sum of the linear momenta of the fragments must be zero. e. the velocity of any one fragment must be equal to the velocity of any other fragment.

What are two different ways you could find the value of a? explain these methods.

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation

Athin electrical heater is inserted between a long circular rod and a concentric tube with inner and outer radii of 20 and 40 mm. the rod (a) has a thermal conductivity of ka = 0.15 w/(m*k), while the tube (b) has a thermal conductivity of kb = 0.8 w/(m*k) and its outer surface is subjected to convection with a fluid of temperature t= -15°c and heat transfer coefficient 60 w/(m2 *k). the thermal contact resistance between the cylinder surfaces and the heater is negligible. (a) determine the electrical power per unit length of the cylinders (w/m) that is required to maintain the outer surface of cylinder b at 15°c. (b) what is the temperature at the center of cylinder a?