What is the difference between hot spot volcanism and subduction zone volcanism?
What will be an ideal response?
Hot spots are stationary mantle plumes that form deep within the mantle, and can produce a set of volcanic islands such as the Hawaiian island chain. Hot-spot volcanism is not related to volcanism in subduction zones.Subduction zone is a deep trench where one plate slides under another. Melting releases low-density magma that rises to form volcanoes such as those along the northwest coast of North America, including Mt. St. Helens.
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A thin beam of laser light of wavelength 514 nm passes through a diffraction grating having 3952 lines/cm. The resulting pattern is viewed on a distant curved screen that can show all bright fringes up to and including ±90.0° from the central spot
If the experiment were performed with all of the apparatus under water (which has an index of refraction of 1.33), what would be the TOTAL number of bright spots that would show up on the screen? A) 6 B) 7 C) 12 D) 13 E) 14
Charge of uniform surface density (4.0 nC/m2) is distributed on a spherical surface (radius = 2.0 cm). What is the total electric flux through a concentric spherical surface with a radius of 4.0 cm?
A. 2.8 N ? m2/C B. 1.7 N ? m2/C C. 2.3 N ? m2/C D. 4.0 N ? m2/C E. 9.1 N ? m2/C
When a 4 cubic ft block of wood floats in a fluid whose weight density is 60 pounds per cubic foot, 3/4 of the block's volume is submerged. The buoyant force on the block is
a. 60 lbs b. 120 lbs c. 180 lbs d. 240 lbs e. none of the above
A spatially uniform magnetic field cannot exert a magnetic force on a particle in which of the following circumstances? There may be more than one correct statement
1.The particle is charged. 2.The particle moves perpendicular to the magnetic field. 3.The particle moves parallel to the magnetic field. 4.The magnitude of the magnetic field changes with time. 5.The particle is at rest.