Q1. A thermometer flashes the temperature in Celsius and Fahrenheit along with the time. If it flashes -4° F, what will the thermometer flash in Celsius?
- -2.2° C
- -20° C
- 24.8° C
- -34.2° C
Q2. A steel container, equipped with a piston, contains 26.0 mol of an ideal gas at 395.0 K. The container is compressed to 0.10 of its original volume. How much work is done on the gas? (R = 8.314 J/K ? mol.)
- -8,500 J
- 200,000 J
- -190,000 J
- 9.1 J
Q3. A gamma ray (a pulse of electromagnetic energy) has a frequency of 2.42 x 1020 Hz. What is the ratio of its wavelength to the radius of the nucleus that produced it (radius = 5.0 x 10-13 cm)?
- 248
- 1.21 x 108
- 39.4
- 0.015
Q4. A simple camera lens with focal object length fo = 9.00 cm perfectly focuses the image of an object on a photographic film located a distance 14.00 cm away from the lens. The object now moves away from the lens and the new focal distance is 13.00 cm. (1) How far did the object move? (2) What is the new magnification?
- (1) 4.05 cm (2) 0.44
- (1) 0.25 cm (2) 1.44
- (1) 0.45 cm (2) 2.25
- (1) 1620.00 cm (2) 0.69