True or False? A car must always have an acceleration in the same direction as its velocity
1.False
2.True
1
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It is a common misconception that a light-year is a unit of _______________
Fill in the blank(s) with correct word
Wave Characteristics: An electromagnetic wave is propagating towards the west in free space. At a certain moment the direction of the magnetic field vector associated with this wave points vertically upward. What is the direction of the electric field vector?
A. horizontal and pointing south B. vertical and pointing down C. horizontal and pointing north D. vertical and pointing upward E. horizontal and pointing east
A 50 cm long organ pipe is filled with air and is open at both ends. The velocity of sound in air at 0
is 331 m/s. What is the wavelength of the second mode?
A. 50 cm B. 75 cm C. 90 cm D. 40 cm E. 63 cm
From full moon to third quarter moon takes about a week
Indicate whether the statement is true or false