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
b
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The precision and number of significant figures in 0.0045 mm is
A. precision = .0001 mm, significant figures = 4. B. precision = .001 mm, significant figures = 4. C. precision = .0001 mm, significant figures = 3. D. precision = .001 mm, significant figures = 3. E. precision = .0001 mm, significant figures = 2.
Two ropes are spliced together as shown
A short time after the incident pulse shown in the diagram reaches the splice, the rope's appearance will be that in
a.
Physics & Space Science
How much power does a sphere with a radius of 10 cm radiate if is has an emissivity e = 1.0 and is kept at a temperature of 400 K? The Stefan-Boltzmann constant is 5.67 x 10-8 W/(m2•K4)
A) 60 W B) 70 W C) 180 W D) 210 W E) 360 W
Two electrons (e1 and e2) and a proton (p) lie on a straight line, as shown. The directions of the force of e2 on e1, the force of p on e1, and the total force on e1, respectively, are: ______e1________e2________p
A) ?, ?, ? B) ?, ?, ? C) ?, ?, ? D) ?, ?, ? E) ?, ?, ?