The 105°W longitude meridian is the center of the ______________ Standard Time zone in the United States
a. Pacific
b. Mountain
c. Eastern
d. Central
b
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Whether the Universe is open, closed or flat depends, on the ___________ of the Universe
a. luminosity b. density c. temperature d. radius e. rotation rate
An electrical insulator is a material:
A) containing no electrons B) through which electrons do not flow easily C) which has more electrons than protons on its surface D) cannot be a pure chemical element E) must be a crystal
A 0.50-kg object is attached to an ideal spring of spring constant 20 N/m along a horizontal, frictionless surface. The object oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position
What are (a) the total energy and (b) the amplitude of vibration of the system?
Energy in Inductors: A 4.0-mH coil carries a current of 5.0 A. How much energy is stored in its magnetic field?
A. 2.0 mJ B. 10 mJ C. 20 mJ D. none of the given answers