Modern firearms use the same principles as muzzleloading firearms. The ignition and burning of gunpowder create pressure. This pressure propels projectile(s) down the bore and out of the muzzle. The first modern firearms used black powder. Since about 1890, modern firearms are designed to use smokeless gunpowder. Smokeless gunpowder creates greater pressures and should not be used in firearms designed for black powder. Watch what happens when the trigger is squeezed on this bolt action rifle.
According to Steven Pinker, somethings have gone down over the last 100 years, but for Literacy rates.
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Why did Steven Pinker says literacy rate has not gone up?</h3>
Steven Pinker who was a researcher did his research on psychology and cognitive science and how the society is evolving came to conclusion that:
- Number of people living in extreme poverty
Has gone down because, the society has not been experiencing some of the listed factor in the recent time but people are still not embracing literacy.
Read more on Literacy rates here:
brainly.com/question/25741658
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Dude what do need help with??
Answer: The things that are listed .
Explanation: The circulatory system is made up of blood vessels that carry blood away from and towards the heart : Arteries carry blood away from the heart and veins carry blood back to the heart .
In women of childbearing age, folic acid supplementation has a demonstrable and meaningful benefit, reducing the incidence of NTDs. Its use in this population is evidence-based and demonstrably effective
