The figure shows a cross section of three parallel wires each carrying a current of 24 A. The currents in wires B and C are out of the paper, while that in wire A is into the paper. If the distance R = 5.0 mm, what is the magnitude of the force on a 4.0-m length of wire A?
a.
15 mN
b.
77 mN
c.
59 mN
d.
12 mN
e.
32 mN
b
Physics & Space Science
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When Portland cement and aggregate are mixed with water, _________reactions bond the Portland cement to the aggregate, thereby forming solid concrete.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
Venus's retrograde spin is not unique among terrestrial planets.
Answer the following statement true (T) or false (F)
Physics & Space Science
What is the sum of 1.53 + 2.786 + 3.3 expressed to the correct number of significant figures?
A) 7 B) 7.6 C) 7.62 D) 7.616 E) 7.6160
Physics & Space Science
A uniform 120-lb beam is supported in a horizontal position by a pin and cable as shown in the figure. What is the magnitude of the force by the pin on the beam?
a.
94 lb
b.
88 lb
c.
63 lb
d.
75 lb
e.
150 lb
Physics & Space Science