The transition from chemistry to biology occurred
A) gradually in a number of distinct steps
B) very quickly in in one single step
C) very quickly in a number of distinct steps
D) gradually in one single step
A
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The theory of special relativity
A) is based on a complex mathematical analysis. B) does not agree with electromagnetic theory. C) does not agree with Newtonian mechanics. D) has not been verified by experiment.
The speed of light in diamond is 1.24 × 10^8m/s. What is the index of refraction of diamond?
The sound level at 1.0 m from a certain talking person talking is 60 dB. You are surrounded by five such people, all 1.0 m from you and all talking equally loud at the same time
The threshold of hearing is 1.0 × 10-12 W/m2. What sound level are you being exposed to? You can neglect any absorption, reflection, or interference of the sound. The threshold of hearing is 1.0 × 10-12 W/m2. A) 300 dB B) 60 dB C) 74 dB D) 67 dB E) 81 dB
The oxygen molecule (O2) may be regarded as two masses connected by a spring. In vibrational motion, each oxygen atom alternately approaches, then moves away from the center of mass of the system. If each oxygen atom of mass m = 2.67 × 10^?26 kg has a vibrational energy of 1.6 × 10^?21 J and the effective spring constant is 86 N/m, then what is the amplitude of oscillation of each oxygen
atom? a. 3.2E–11 m b. 1.6E–11 m c. 1.1E–11 m d. 6.1E–12 m e. 4.3E–12 m