Mass on a Spring: A 0.50-kg object is attached to an ideal spring of spring constant (force constant) 20 N/m along a horizontal, frictionless surface. The object oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position. At what distance from the equilibrium position are the kinetic energy and potential energy of the system the same?

A. 0.017 m
B. 0.029 m
C. 0.12 m
D. 0.17 m


Answer: D

Physics & Space Science

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If R = 4.0 k?, C = 3.0 mF, ? = 15 V, Q = 12 mC, and I = 2.0 mA, what is the potential difference Vb ? Va?



a.
+3.0 V

b.
?19 V

c.
?3.0 V

d.
+27 V

e.
+21 V

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After recombination occurred, the Universe was plunged into a period of time known as the ___________, which lasted hundreds of millions of years until the first stars were born

Fill in the blank(s) with correct word

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A box is moved 20 m across a smooth floor by a force making a downward angle with the floor, so that there is effectively a 10 N force acting parallel to the floor in the direction of motion and a 5 N force acting perpendicular to the floor. The work done is

A. 300 J. B. 100 J. C. 200 J. D. 5.0 J. E. 20 J.

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An object is placed to the left of a converging lens. Determine if the following statement is true or false. The image can be upright or inverted

1.True 2.False

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