A tropical storm becomes a hurricane when its wind speed reaches
a. 50 mi/h.
b. 120 mi/h.
c. 74 mi/h.
d. 100 mi/h.
c
Physics & Space Science
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Two very long parallel wires carry currents in the positive x direction. One wire (current = 15 A) is coincident with the x axis. The other wire (current = 50 A) passes through the point (0, 4.0 mm, 0). What is the magnitude of the magnetic field at the point (0, 0, 3.0 mm)?
a. 3.8 mT b. 2.7 mT c. 2.9 mT d. 3.0 mT e. 0.6 mT
Physics & Space Science
A particular sound with large intensity is reduced 1000-fold. What is the decibel reduction?
Physics & Space Science
What is a selective surface?
What will be an ideal response?
Physics & Space Science
If the primary colors of the subtractive theory are cyan, magenta, and yellow, why are the colors in the artist's subtractive theory red, blue, and yellow?
Physics & Space Science