Sound in a vacuum is impossible
a. True
b. False
Indicate whether the statement is true or false
True
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According to the second law of thermodynamics, for any process that may occur within an isolated system, which one of the choices applies?
A) Entropy remains constant. B) Entropy increases. C) Entropy decreases. D) Both A and B are possible. E) Both A and C are possible.
Charge of uniform density (20 nC/m2) is distributed over a cylindrical surface (radius = 1.0 cm), and a second coaxial surface (radius = 3.0 cm) carries a uniform charge density of ?12 nC/m2 . Determine the magnitude of the electric field at a point 4.0 cm from the symmetry axis of the two surfaces
a. 0.45 kN/C b. 1.0 kN/C c. 0.73 kN/C d. 0.56 kN/C e. 2.3 kN/C
Give an example in which velocity is zero yet acceleration is not.
What will be an ideal response?
Which is more massive?
A. Earth (a solid object) B. the Sun (a gaseous giant)