A horizontal plank (m = 2.0 kg, L = 1.0 m) is pivoted at one end. A spring (k = 1.0 × 103 N/m) is attached at the other end, as shown in the figure. Find the angular frequency (in rad/s) for small oscillations.
?
?
A. 39
B. 44
C. 55
D. 66
E. 25
Answer: A
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a. is flowing upward b. is flowing downward towards the core c. stays horizontal on the surface d. is spiraling westward e. is spiraling eastward
First Law of Thermodynamics: A monatomic ideal gas having an initial pressure of 500 kPa and an initial volume of 1.80 L expands isothermally to a final volume of 5.20 L. How much work is done by the gas in this process? (R = 8.31 J/mol ? K)
A. 955 J B. 900 J C. 875 J D. 1570 J E. 1700 J
A car moves from a point located 26.0 m from the origin and at an angle of 35.0° from the x-axis to a point located 56.0 m from the origin and at an angle of 60.0° from the x-axis in 2.50 s
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A bar magnet is dropped from above and falls through the loop of wire shown below. The north pole of the bar magnet points downward towards the page as it falls. Which statement is correct?
a.
The current in the loop always flows in a clockwise direction.
b.
The current in the loop always flows in a counterclockwise direction.
c.
The current in the loop flows first in a clockwise, then in a counterclockwise direction.
d.
The current in the loop flows first in a counterclockwise, then in a clockwise direction.
e.
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