Question: Areas that should not be soldered may be covered with solder resist (solder mask). One of the most common solder resists used today is called "LPI" (liquid photoimageable solder mask). A photo-sensitive coating is applied to the surface of the PWB, then exposed to light through the solder mask image film, and finally developed where the unexposed areas are washed away. Dry film solder mask is similar to the dry film used to image the PWB for plating or etching. After being laminated to the PWB surface it is imaged and develop as LPI. Once common but no longer commonly used because of its low accuracy and resolution is to screen print epoxy ink. Solder resist also provides protection from the environment.
Try to answer this question if possible: If part of a PCB isn't solderable, what can be used instead?
Answer: solder resist
Question: After the fall of Napoleon, many alpine countries developed heavy protections to prevent any new invasion. Thus, Savoy built a series of fortifications in the Maurienne valley in order to protect the major alpine passes, such as the col du Mont-Cenis that was even crossed by, Charlemagne and his father to defeat the Lombarts. The later indeed became very popular after the construction of a paved road ordered by Napoleon Bonaparte. The Barriere de l'Esseillon is a serie of forts with heavy batteries, built on a cliff with a perfect view on the valley, a gorge on one side and steep mountains on the other side.
Try to answer this question if possible: Who built a series of fortifications in the Maurienne valley?
Answer: Savoy
Question: The Crimean War (18531856) was part of a long-running contest between the major European powers for influence over territories of the declining Ottoman Empire. The financial burden of the war led the Ottoman state to issue foreign loans amounting to 5 million pounds sterling on 4 August 1854. The war caused an exodus of the Crimean Tatars, about 200,000 of whom moved to the Ottoman Empire in continuing waves of emigration. Toward the end of the Caucasian Wars, 90% of the Circassians were ethnically cleansed and exiled from their homelands in the Caucasus and fled to the Ottoman Empire, resulting in the settlement of 500,000 to 700,000 Circassians in Turkey.[page needed] Some Circassian organisations give much higher numbers, totaling 11.5 million deported or killed.
Try to answer this question if possible: On what date did the Ottoman empire issue foreign loans to deal with the cost of the war?
Answer: 4 August 1854
Question: On December 13, 2013, Beyonce unexpectedly released her eponymous fifth studio album on the iTunes Store without any prior announcement or promotion. The album debuted atop the Billboard 200 chart, giving Beyonce her fifth consecutive number-one album in the US. This made her the first woman in the chart's history to have her first five studio albums debut at number one. Beyonce received critical acclaim and commercial success, selling one million digital copies worldwide in six days; The New York Times noted the album's unconventional, unexpected release as significant. Musically an electro-R&B album, it concerns darker themes previously unexplored in her work, such as "bulimia, postnatal depression [and] the fears and insecurities of marriage and motherhood". The single "Drunk in Love", featuring Jay Z, peaked at number two on the Billboard Hot 100 chart. In April 2014, after much speculation in the weeks before, Beyonce and Jay Z officially announced their On the Run Tour. It served as the couple's first co-headlining stadium tour together. On August 24, 2014, she received the Video Vanguard Award at the 2014 MTV Video Music Awards. Knowles also took home three competitive awards: Best Video with a Social Message and Best Cinematography for "Pretty Hurts", as well as best collaboration for "Drunk in Love". In November, Forbes reported that Beyonce was the top-earning woman in music for the second year in a rowearning $115 million in the year, more than double her earnings in 2013. Beyonce was reissued with new material in three forms: as an extended play, a box set, as well as a full platinum edition.
Try to answer this question if possible: When did Beyonce release her fifth studio album?
Answer:
December 13, 2013