Thousands of magnetic marbles are thrown into a vertically oriented wind tunnel. As they are thrown, no marbles are free from other marbles. Instead, they clump together in groups of varying numbers.
The wind tunnel operator is able to control the upward force of the wind so as to make clumps of marbles hover. She records the various forces of wind required to maintain hovering clumps in units of ounces: 45, 30, 60, 75, 105, 35, 80, 55, 90, 20, 65. From this data, what might be the weight of a single magnetic marble? What is the force of the wind analogous to within Millikan's experiment? A) 3 ounces; the force of the wind is analogous to the force of gravity within Millikan's experiment.
B) 3 ounces; the force of the wind is analogous to the strength of the electric field within Millikan's experiment.
C) 5 ounces; the force of the wind is analogous to the force of gravity within Millikan's experiment.
D) 5 ounces; the force of the wind is analogous to the strength of the electric field within Millikan's experiment.
Question 2
Can a person claim himself/herself to be a scientist if he/she no longer does experiments?
A) No. Officially defined, a scientist is a person actively engaged in experimentation.
B) No. Since experimentation is one of the four key components of the scientific process, any person no longer actively engaged in performing experiments cannot officially claim to be a scientist.
C) Yes and No. A person may claim to be a scientist but the scientific community no longer officially recognizes him/her as such.
D) Yes. A professional scientist is recognized for more activities than the performance of actual experiments.
This 1900 photograph of steel factories at night in Duquesne, near Pittsburgh, was tinted by hand. S
Major Wind Systems: Katabatic Winds
Types of wind deposits
Measuring Wind
A current-carrying wire is placed in a uniform magnetic field, as shown below.
A box contains red, yellow and green marbles. Half of the marbles are red, 1/8 of the remaining ...