What elements do the symbols H, O, C, and N stand for?
a. hydrogen, ozone, carbon, nitrogen
b. hydrogen, oxygen, chlorine, nitrogen
c. hydrogen, oxygen, carbon, natrium
d. hydrogen, oxygen, carbon, nitrogen
e. none of the above
D
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Suppose you are looking down on a disk that is spinning counterclockwise. If we apply an upward torque to the disk, its angular speed
A. Increases. B. Decreases. C. Remains the same
A 30. kg child stands at one end of a floating 20. kg canoe that is 10. ft long. The child walks to the other end of the canoe. How far does the canoe move in the water assuming water friction is negligible?
A) 10. ft B) 4.0 ft C) 6.0 ft D) 8.0 ft E) 2.0 ft
If a = 60 cm, b = 80 cm, Q = ?4.0 nC, and q = 1.5 nC, what is the magnitude of the electric field at point P?
a.
68 N/C
b.
72 N/C
c.
77 N/C
d.
82 N/C
e.
120 N/C
You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. When you increase the plate separation, what happens to the value of ?V?
1.It increases. 2.It decreases. 3.It stays the same.