The spectra of molecules are more complex because molecules can vibrate and ________ instead of just exhibiting electronic transitions like atoms
Fill in the blank(s) with correct word
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Two point charges are separated by 12.0 cm and have charges of +5.0 µC and ?5.0 µC, respectively. What is the electric field at a point midway between the two charges? (ke = 8.99 × 10^9 N·m2/C2)
a. 3.7 × 10^6 N/C b. 2.5 × 10^7 N/C c. 3.1 × 10^6 N/C d. 2.1 × 10^8 N/C e. zero
A refrigerator has a coefficient of performance of 4 . If the refrigerator absorbs 30 cal of heat from the cold reservoir in each cycle, the heat expelled (in cal) into the heat reservoir is
a. 40.5 b. 37.5 c. 36.5 d. 34.5 e. 22.5
All the following statements are true. Which one explains why our calendar has leap years?
A) A tropical year is slightly more than 365 days. B) Earth's axis precesses with a period of about 26,000 years. C) There is a difference between a sidereal year and a tropical year. D) Earth's speed varies as it orbits the Sun.
A 500-W device is connected to a 120-V ac power source. What rms current flows through this device?
A) 4.2 A B) 5.9 A C) 120 A D) 150 A E) 170 A