In parts of Chinatown, Brooklyn and Queens, businesses are capitalizing on the increasingly difficult homework and more frequent testing, charging up to $3,000 for eight-week tutoring sessions, according to Teresa Ying Hsu, executive director of Asian-American Communicadvocacyan advocacy group.
Nordstrom has added Wi-Fi to almost all its stores, in part so its app will work fast, and is testing charging stations and clusters of iPads and computers.
JPMorgan Chase tested charging a $5 ATM fee for non-network customers in Illinois in July, a plan they ultimately abandoned.
The tests are not cheap: Pearson, the company that creates the standardized exams and the field tests, charged the state about $7 million for testing services for the 2012 calendar year — 30 percent of that budget went toward field testing.
The strength of the electric field depends on the source charge, not on the test charge.
Strictly speaking, the introduction of a small test charge, which itself has an electric field, slightly modifies the existing field.
If they had arrived one afternoon during a storm they might have found him a mile away from the farm, waiting for a thunder clap so he could detonate a test charge.
The electric field may be thought of as the force per unit positive charge that would be exerted before the field is disturbed by the presence of the test charge.
If the second, or test, charge is twice as great, the resultant force is doubled; but their quotient, the measure of the electric field E, remains the same at any given point.
