Graphical Addition: The magnitude of the resultant of two vectors cannot be less than the magnitude of either of those two vectors.
A. True
B. False
Answer: B
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Which of the following aluminum alloys is not recommended for welding?
(a) 3003 (b) 5052 (c) 6061 (d) 7075
A CD has a diameter of 12.0 cm. If the CD is rotating at a constant angular velocity of 20.0 radians per seconds, then the frequency of the rotational motion is
A. 2.14 Hz. B. 3.18 Hz. C. 3.83 Hz D. 4.50 Hz. E. 4.89 Hz.
Plants get their energy directly from the Sun and their carbon from the atmosphere. Given this, they can be classified metabolically as
A) photoheterotrophs B) chemoheterotrophs C) chemoautotrophs D) photoautotrophs
Two single charged ions moving perpendicularly to a uniform magnetic field (B = 0.40 T) with speeds of 5 000 km/s follow circular paths that differ in diameter by 5.0 cm. What is the difference in the mass of these two ions?
a. 2.6 × 10^?28 kg b. 6.4 × 10^?28 kg c. 3.2 × 10^?28 kg d. 5.1 × 10^?28 kg e. 1.1 × 10^?28 kg