Find the moment about the point A( – 3, 6, – 1) m of a force li + 0j – 7k N acting through the point B( – 3, – 6, – 1) - -

What is the cause of surface tension? Multiple Choice O Attractive forces between the atoms O Repulsive forces between the atoms O Repulsive forces between the molecules O Attractive forces between the molecules

What are valid reasons for adding Yttrium to the zirconia in the Thermal Barrier Coating (TBC) in a turbine blade? Select one or more: a. To increase the weight of the TBC b. To match the thermal conductivity of the TBC to the underlying oxide layer To avoid breakage during change in thermal conditions d. To prevent a change of the crystallographic structure as the temperature changes To match the thermal conductivity of the TBC to the metal substrate C. e.