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  2. Japanese submarine I-401 - Wikipedia

    en.wikipedia.org/wiki/Japanese_submarine_I-401

    I-401 (伊号第四百一潜水艦, I-gō-dai yon-hyaku-ichi-sensuikan) was an Imperial Japanese Navy Sentoku-type (or I-400-class) submarine commissioned in 1945 for service in World War II.

  3. List of Massachusetts area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Massachusetts_area...

    Numbering plan areas and area codes since May 2001 September 1997 [1] – May 2001 [2] July 1988 [3] – September 1997 [4] [5] October 1947 – July 1988 [6]. Massachusetts is divided into five distinct numbering plan areas (NPAs), which are served by nine area codes in the North American Numbering Plan (NANP), [7] organized as four overlay complexes and a single-area code NPA.

  4. 401 (a) - Wikipedia

    en.wikipedia.org/wiki/401(a)

    In the United States, a 401(a) plan is a tax-deferred retirement savings plan defined by subsection 401(a) of the Internal Revenue Code. [1] The 401(a) plan is established by an employer, and allows for contributions by the employer or both employer and employee. [ 2 ]

  5. List of ICD-9 codes 390–459: diseases of the circulatory system

    en.wikipedia.org/wiki/List_of_ICD-9_codes_390...

    3 Hypertensive disease (401–405) 4 Ischemic heart disease (410–414) 5 Diseases of pulmonary circulation (415–417) 6 Other forms of heart disease (420–429)

  6. Ethane-1,2-dithiol - Wikipedia

    en.wikipedia.org/wiki/Ethane-1,2-dithiol

    1,2-Ethanedithiol is a weak acid, typical of alkyl thiols. In the presence of base and an alkylating agent, 1,2-ethanedithiol converts to thioethers:

  7. Initial mass function - Wikipedia

    en.wikipedia.org/wiki/Initial_mass_function

    The initial mass function is typically graphed on a logarithm scale of log(N) vs log(m).Such plots give approximately straight lines with a slope Γ equal to 1–α.Hence Γ is often called the slope of the initial mass function.

  8. Thermal mass - Wikipedia

    en.wikipedia.org/wiki/Thermal_mass

    The equation relating thermal energy to thermal mass is: = where Q is the thermal energy transferred, C th is the thermal mass of the body, and ΔT is the change in temperature.

  9. Harmonic Maass form - Wikipedia

    en.wikipedia.org/wiki/Harmonic_Maass_form

    In mathematics, a weak Maass form is a smooth function on the upper half plane, transforming like a modular form under the action of the modular group, being an eigenfunction of the corresponding hyperbolic Laplace operator, and having at most linear exponential growth at the cusps.