The rapid rotation in the outer disk suggests that our galaxy is more massive than previously thought
a. True
b. False
Indicate whether the statement is true or false
True
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For the E-glass and epoxy composite material in Problem 12.1, calculate the thermal conductivity (kT) in the parallel and transverse directions to the fiber axis. The thermal conductivity of E-glass is 13 Wm-1 K-1 and for epoxy it is 0.1 Wm-1 K-1 .
What will be an ideal response?
Light goes slower through glass than through air
a. True b. False Indicate whether the statement is true or false
A mass attached to a spring vibrates back and forth. At the equilibrium position, the
A) velocity reaches zero. B) acceleration reaches a maximum. C) net force reaches a maximum. D) velocity reaches a maximum.
Which of the following is not implied by this diagram?
A) There are six distinct forces known to operate in the universe, and a seventh force called the "super force" might also exist. B) At very high temperatures, the electromagnetic and weak forces are no longer distinct but instead act as a single electroweak force. C) At the current temperature of the universe, gravity is the weakest of the forces. D) At the current temperature of the universe, the strong force is the strongest of the forces.