Physics, 12.12.2020 16:20 kenzieeee96
1. What is one of the oldest tests in a chemist’s toolbox?
2. Each element essentially has its own when viewed through the new device
making use of a prism called a .
3. This element was first found on the sun because of the use of the spectroscope.
4. is credited for bringing order to the unruly nature of all the known elements at the time.
5. At the end of the 1860”s how many different scientists detected a hidden order to the elements?
6. What was the publication date of Mendeleev’s first two chapters of his second volume?
7. Mendeleev likens the problem of the elements to his favorite card game called .
8. What two elements crystallized Mendeleev’s thinking about the order which alluded him?
and
9. Mendeleev not only left blanks in his periodic table, but also suggested for
those elements.
10. “The laws of nature to do not permit .
Answers: 3
Physics, 22.06.2019 10:00
This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !
Answers: 1
Physics, 23.06.2019 03:00
Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2 . how much is the spring compressed x from its natural length?
Answers: 3
Physics, 23.06.2019 11:00
Based on the diagram of the electric field lines around the two spherical charges, what are the signs of the left and right charge respectively?
Answers: 3
1. What is one of the oldest tests in a chemist’s toolbox?
2. Each element essentially has its own...
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