Magnetic Field of a Long Wire: Three very long, straight, parallel wires each carry currents of 4.0 A, directed out of the page as shown in the figure. These wires pass through the vertices of a right isosceles triangle as shown. Assume that all the quantities shown in the figure are accurate to two significant figures. What is the magnitude of the magnetic field at point P at the midpoint of the hypotenuse of the triangle? (?0 = 4? × 10-7 T ? m/A)
A. 4.4 µT
B. 18 µT
C. 57 µT
D. 130 µT
E. 1.8 µT
Answer: C
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The isotope 238U, which starts one of the natural radioactive series, decays first by alpha decay followed by two negative beta decays. At this point, what is the resulting isotope?
a. 238U b. 236U c. 234Th (Z = 90 for Th.) d. Some other uranium isotope not given above.
When an element is oxidized, it ______________ electrons
Fill in the blank(s) with correct word
Incompressible water flows out of a large reservoir through a pipe that opens to the atmosphere 5.70 m below the level of the water in the reservoir. What is the speed of the water as it comes out of the pipe?
A) 1.72 m/s B) 7.47 m/s C) 55.8 m/s D) 10.6 m/s E) 27.9 m/s