Which labels belong in the regions marked X and Y? A. X: Absorbs energy from the core
Y: Takes longer for photons to move through
B. X: Releases energy to the photosphere
Y: Takes longer for photons to move through
C. X: Takes longer for photons to move through
Y: Absorbs energy from the core
D. X: Takes longer for photons to move through
Y: Releases energy to the photosphere

Aluminum–lithium (al-li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. a commercial aircraft skin material having a density of 2.47 g/cm3 is desired. compute the concentration of li (in wt%) that is required.

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

What is the standard unit of measure for acceleration?