A mass on a spring vibrates in simple harmonic motion at a frequency of 4.26 Hz and an amplitude of 3.00 cm. If a timer is started when its displacement is a maximum (hence x = 3.00 cm when t = 0), what is the acceleration magnitude when t = 3.74 s?
a. zero
b. 0.732 m/s2
c. 39.2 m/s2
d. 19.6 m/s2
e. 10.5 m/s2
d
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Silica has a relatively
A) low melting point. B) high melting point.
Four moles of nitrogen gas are contained in an enclosed cylinder with a movable piston. If the gas temperature is 298 K, and the pressure is 1.01 × 10^6 N/m2, what is the volume? (R = 8.31 J/mol•K)
a. 9.81 × 10^-3 m3 c. 17.3 × 10^-3 m3 b. 4.90 × 10^-3 m3 d. 8.31 × 10^-3 m3
The diffusion constant for water in air is 
How long would it take a water molecule to diffuse a distance of 10.0 meters?
A. 400 hours B. 450 hours C. 500 hours D. 580 hours E. 600 hours
The index of refraction for a certain material is 1.399 for red light and 1.432 for blue light. Find the angle separating the two refracted colors if the: (a) angle of incidence is 30°. (b) angle of incidence is 60°
What will be an ideal response?