Uniform Electric Fields: A spherical oil droplet with nine excess electrons is held stationary in an electric field between two large horizontal plates that are 2.25 cm apart. The field is produced by maintaining a potential difference of 0.3375 kV across the plates, and the density of the oil is 824 kg/m3. What is the radius of the oil drop? (e = 1.60 × 10-19 C)
Fill in the blank(s) with the appropriate word(s).
8.61 µm
You might also like to view...
Which variable (period or length) does the graph show to be increasing the fastest? (Note: If they were increasing at the same rate, the graph would be a straight line.)
The diagram shows a planet at four positions in its orbit. At which position does it have the greatest gravitational potential energy?
A) 1 B) 2 C) 3 D) 4 E) The gravitational potential energy is the same at all four positions.
The pilot of an aircraft flies due north relative to the ground in a wind blowing 40 km/h toward the east. If his speed relative to the ground is 80 km/h, what is the speed of his airplane relative to the air?
A. 89 km/h B. 85 km/h C. 81 km/h D. 76 km/h E. 72 km/h
Earth has a radius of about 6400 km, the Sun has a radius of about 7.0×10^5 km, and a rubber ball has a radius of 6.4 cm. If you were to construct a scale model of the solar system using the rubber ball to represent Earth, what is the radius of a ball needed to represent the Sun in your model?
a. 7.0 × 10^5 cm b. 7.0 cm c. 700 cm d. 70 cm e. 7000 cm