Problem: The ammunition and shells fired by these weapons are usually fitted with different types of fuses (barometric, time-delay, or proximity) to explode close to the airborne target, releasing a shower of fast metal fragments. For shorter-range work, a lighter weapon with a higher rate of fire is required, to increase a hit probability on a fast airborne target. Weapons between 20 mm and 40 mm caliber have been widely used in this role. Smaller weapons, typically .50 caliber or even 8 mm rifle caliber guns have been used in the smallest mounts.
At shorter ranges a light weapon with what is used on fast targets?
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Answer: a higher rate of fire

Problem: Everton F.C. is a limited company with the board of directors holding a majority of the shares. The club's most recent accounts, from May 2014, show a net total debt of 28.1 million, with a turnover of 120.5 million and a profit of 28.2 million. The club's overdraft with Barclays Bank is secured against the Premier League's "Basic Award Fund", a guaranteed sum given to clubs for competing in the Premier League. Everton agreed a long-term loan of 30 million with Bear Stearns and Prudential plc in 2002 over the duration of 25 years; a consolidation of debts at the time as well as a source of capital for new player acquisitions. Goodison Park is secured as collateral.
In what month in 2002 did Everton agree to a long-term loan?
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Answer: unanswerable

Problem: The quality of a vacuum is indicated by the amount of matter remaining in the system, so that a high quality vacuum is one with very little matter left in it. Vacuum is primarily measured by its absolute pressure, but a complete characterization requires further parameters, such as temperature and chemical composition. One of the most important parameters is the mean free path (MFP) of residual gases, which indicates the average distance that molecules will travel between collisions with each other. As the gas density decreases, the MFP increases, and when the MFP is longer than the chamber, pump, spacecraft, or other objects present, the continuum assumptions of fluid mechanics do not apply. This vacuum state is called high vacuum, and the study of fluid flows in this regime is called particle gas dynamics. The MFP of air at atmospheric pressure is very short, 70 nm, but at 100 mPa (~6997100000000000000♠️1103 Torr) the MFP of room temperature air is roughly 100 mm, which is on the order of everyday objects such as vacuum tubes. The Crookes radiometer turns when the MFP is larger than the size of the vanes.
What indicates the quality of residual gases?
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Answer:
unanswerable