When two arches in a magnetic field encounter each other, ____ can cause powerful eruptions called ____
a. solar winds; convective zones
b. prominences; limb darkening
c. filaments; coronal holes
d. supergranules; Coulumb barriers
e. reconnection events; flares
e
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Which of the following is not associated with a solid that has covalent bonding?
a) Localized valence electrons (b) High cohesive energy (c) Close-packing of atoms (d) Low density relative to molar weight
Simple Harmonic Motion: An object is oscillating on a spring with a period of 4.60 s. At time t = 0.00 s the object has zero speed and is at x = 8.30 cm. What is the acceleration of the object at t = 2.50 s?
A. 1.33 cm/s2 B. 0.784 cm/s2 C. 11.5 cm/s2 D. 14.9 cm/s2 E. 0.00 cm/s2
When light is either reflected or refracted, the quantity that does not change in either process is its
A. direction of travel. B. dispersion. C. frequency. D. speed. E. wavelength.
An ideal monatomic gas undergoes a reversible expansion to 1.5 times its original volume. In which of these processes does the gas have the largest loss of internal energy?
A) at constant pressure B) if the pressure increases in proportion to the volume C) if the pressure decreases in proportion to the volume D) at constant temperature E) adiabatically