In a Voigt solid, if a tensile stress is applied at t=0, the total strain at t=0 is equal to _________.
Fill in the blank(s) with the appropriate word(s).
zero
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The speed of sound in air at 0
is 331 m/s. What is the velocity of sound in air at a temperature of 30
?
A. 336 m/s B. 338 m/s C. 340 m/s D. 342 m/s E. 349 m/s
The radius of a sphere is 2.00 m. The surface area of the sphere is
A. 36.7 
B. 50.3
C. 72.5
D. 75.0
Exhibit 4-2Newton approximated motion in a circle as a series of linear motions, as in the polygon below.
Assume that the particle moves at constant speed vA from A to B, and at constant speed vB from B to C.Use this exhibit to answer the following question(s).
Refer to Exhibit 4-2. The direction of the change in velocity, 
, at point B, is shown by the arrow in
A.
B.
C.
D.
E.
Which of the following statements are not falsi?able? Being falsi?able means that, in principle, it can be shown to be false by observations or experiments
A) Human beings were created by God. B) The Sun is at the center of the solar system. C) The observable universe contains about 100 billion galaxies. D) The Earth is at the center of the solar system. E) The chemical content of the universe is mostly hydrogen and helium.