The correct sequence of the events is the following:
1. Sputnik I was the first artificial Earth satellite. The Soviet Union's Sputnik 1 satellite took to the skies on Oct. 4, 1957.
2. NASA was formed - The National Aeronautics and Space Administration (NASA) agency was was created in 1958 from NACA (National Advisory Committee for Aeronautics)
3. The Soviet pilot and cosmonaut Yuri Alekseyevich Gagarin completed an orbit of the Earth on 12 April 1961.
4. The astronaut John Glenn orbits the Earth on February 20, 1962.
Neil Armstrong lands on the moon,
Answer:
Just-in-time (JIT) inventory systems started in Japan in the 1970s and spread to the U.S. about a decade later. JIT is an inventory-management system that aims to help businesses have just enough inventory readily available to meet current demand while avoiding excess. There are many pros and cons for a small business to consider before adopting a JIT system.
In the late 1800s, people in many parts of the world decided to leave their homes and immigrate to the United States. Fleeing crop failure, land and job shortages, rising taxes, and famine, many came to the U. S. because it was perceived as the land of economic opportunity.
The pH of the substance is 3.3 which is acidic.
<h3>What is pH?</h3>
The pH of a substance or solution is referred to the degree of acidity or alkalinity of that substance. It is measured on a scale of 0 -14.
Given the concentration of hydrogen ions as 5. 0 × 10–4 moles per liter,we use the formulae
ph = –log[h+]
plugging in thge value of h+ as 5. 0 × 10–4 moles per liter we have:
pH = –log{5. 0 × 10–4 ]
pH=3.3
See here for calculation of pHs: brainly.com/question/26430079
