A stream of a certain liquid compound is not attracted to an electrically charged rod. The compound is probably
a. metallic.
b. ionic.
c. nonpolar covalent.
d. polar covalent.
c
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An exerciser lifts 10.00 N weights a vertical distance of 50.00 cm. How many times would the exerciser have to lift the weight to use 10.00 Calories of energy?
A. 7,503 B. 4,125 C. 5,170 D. 8,370 E. 9,670
A 20-mF capacitor is attached across a 1000-V power supply. What is the net charge on the capacitor?
a. 20 mC c. 10 mC b. 40 mC d. none of these choices
The rigid object shown is rotated about an axis perpendicular to the paper and through point P. The total kinetic energy of the object as it rotates is equal to 1.4 J. If M = 1.3 kg and L = 0.50 m, what is the angular velocity of the object? Neglect the mass of the connecting rods and treat the masses as particles
a.
1.3 rad/s
b.
1.5 rad/s
c.
1.7 rad/s
d.
1.2 rad/s
e.
2.1 rad/s
A sensitive ammeter is connected to a wire loop and placed within the magnetic field of a strong horseshoe magnet. The ammeter shows a deflection when:
a. the wire is moved parallel to the field. b. neither wire nor magnet is moving. c. the wire's axis is parallel to the field. d. the wire is moved perpendicularly to the field.