Tornadoes are rapidly rotating winds that blow counterclockwise around a small area of intense
A) high pressure.
B) low pressure.
Answer: B
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The path of a charged particle moving parallel to a uniform magnetic field will be a
a. straight line. b. circle. c. ellipse. d. parabola.
A charge of uniform density (0.80 nC/m) is distributed along the x axis from the origin to the point x = 10 cm. What is the electric potential (relative to zero at infinity) at a point, x = 18 cm, on the x axis?
a. 7.1 V b. 5.8 V c. 9.0 V d. 13 V e. 16 V
A horizontal wire of length 3.6 m carries a current of 6.0 A and is oriented so that the current direction is 50° S of W. The Earth's magnetic field is due north at this point and has a strength of 0.14 × 10^-4 T. What is the direction of the force on the wire?
a. 40° S of E c. toward the Earth's surface b. out of the Earth's surface d. due east
The heat of fusion for lead at 327.0 
22.9 kJ/kg and the specific heat of lead is 0.130 kJ/kg
What is the energy needed to melt 100 grams of lead starting at 0
?
A. 3.56 kJ B. 4.23 kJ C. 6.54 kJ D. 7.02 kJ E. 7.76 kJ