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Given a total mass of the atmosphere of 5.15 × 10 18 kilograms (1.135 × 10 19 lb), the atmosphere contains on the order of 2.03 gigatonnes (2.00 × 10 9 long tons; 2.24 × 10 9 short tons) of xenon in total when taking the average molar mass of the atmosphere as 28.96 g/mol which is equivalent to some 394-mass ppb.
The 7.62-centimetre (3 in) high-angle guns had a maximum elevation of +75 degrees, and had a rate of fire of 13 to 20 rounds per minute. They fired a 6 kg (13 lb) projectile with a muzzle velocity of 680 m/s (2,200 ft/s) to a maximum height of 7,500 metres (24,600 ft). [26]
The 75 mm guns also had a muzzle velocity of 850 m/s when firing their 5.93-kilogram (13.1 lb) shells. At an elevation of +40°, the guns had a range of 14,100 meters (15,400 yd). The carrier had stowage for 450 rounds per gun. The 37 mm guns were semi-automatic loading and only had a rate of fire of 20 rounds per minute. They had an effective ...
A rebuttal in Astronomy & Geophysics countered that Loeb et al. had ignored that the amount of iridium deposited around the globe, 2.0 × 10 8 –2.8 × 10 8 kg (4.4 × 10 8 –6.2 × 10 8 lb), was too large for a comet of the size implied by the crater, and that they had overestimated likely comet impact rates.
The guns were capable of firing a 1,400 pounds (640 kg) armor-piercing (AP) projectile at a muzzle velocity of 2,800 fps (853 m/s) to a range of 24,000 yards (22 km) at a maximum angle of 15 degrees. [37] Later designs called for eight 16"/50 caliber Mark 2 gun, also slated to be used on the South Dakota-class battleship of 1920. [25]
Mass: The lift-off mass was 1,337.2 kg (2,948 lb), including 852 kg (1,878 lb) of propellant. [3] Bus: The spacecraft's bus is a modified I-1 K structure and propulsion hardware configuration, similar to Chandrayaan-1, India's lunar orbiter that operated from 2008 to 2009, with specific improvements and upgrades needed for a Mars mission. [52]
A 2014 CNN survey reported the average NFL player was 6 ft 2 in (1.88 m) and weighed 216 lb (98 kg). [4] In American and Canadian Football, a tall quarterback is at an advantage because it is easier for him to see over the heads of large offensive and defensive linemen while he is in the pocket in a passing situation.
The average mass of an adult human is 59 kg (130 lb) for females and 77 kg (170 lb) for males. [161] [162] Like many other conditions, body weight and body type are influenced by both genetic susceptibility and environment and varies greatly among individuals. [163] [164] Humans have a far faster and more accurate throw than other animals. [165]