The thermodynamic properties of solid Li are mainly determined by acoustic modes of oscillation for temperature higher than a few Kelvin. Li crystallizes in a BCC structure with lattice constant (cube side) a= 3.5A. (a) Sketch the heat capacity of Li as a function of temperature. Indicate explicitly the value at large temper- ature. (b) If the sound velocity at low frequency is v = 6 10° cm/sec, what is the value of the Debye frequency wD and Debye temperature Tp?

12. Find o (in degrees). y hip (1.1, 0.8) knee (1.35, 0.51) ankle (1.21 0.15) (0, 0)! X Copyrighte 2015 Woltes Kluner - All Rights Reserved

The dot product of the same vector to itself is magnitude of the vector O Infinity O square of magnitude of the vector The curl of a curl of a vector gives a O Zero value O Vector O non zero value Scalar

1. Express the following numbers in scientific notation. c. 0.000243 d. -91.123

10. What is the acceleration (m/s2) for an incline with an angle 23.3 degrees?

1. Express the force as representation. a Cartesian vector or Rectangular F= 50 lb 45°

A vector makes a 22˚ angle with the horizontal and has a magnitude of 6. Decompose the vector and round to the nearest hundredth.

Given the vector A = (9.34 i - 55.27 j) m, find the angle that the vector A makes with respect to the +x-axis, %3D counter-clockwise from said axis. Express your answer in two decimal places.

3) Vector A has magnitude 45 and direction 27°. Vector B has magnitude 30 and direction 128°. Find the cross product Ả× B.