Mass on a Spring: A ball vibrates back and forth from the free end of an ideal spring having a force constant (spring constant) of 20 N/m. If the amplitude of this motion is 0.30 m, what is the kinetic energy of the ball when it is 0.30 m from its equilibrium position?
A. 0.00 J
B. 0.22 J
C. 0.45 J
D. 0.90 J
E. 1.4 J
Answer: A
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Simple Harmonic Motion: The position of an object that is oscillating on a spring is given by the equation x = (18.3 cm) cos[(2.35 s-1)t]. What are the (a) frequency, (b) amplitude, and (c) period of this motion?
What will be an ideal response?
Energy Levels: What is the ionization energy of the neutral hydrogen atom?
A. 27.2 eV B. 13.6 eV C. 6.8 eV D. none of the given answers
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A) 0.002 % B) 2 % C) 70 % D) 98%
If a compound is solid, has a high melting point, conducts electricity in the liquid phase, and dissolves in water, it is most likely to be a(n)______________ compound
a. intermediate b. organic c. covalent d. ionic