Marie Curie was a Polish scientist that specialized in chemistry and physics. She wanted to understand how X-rays worked and noticed in her studies that the element, Uranium, gave off rays
Marie Curie was a Polish scientist that specialized in chemistry and physics. She wanted to understand how X-rays worked and noticed in her studies that the element, Uranium, gave off rays that could be measured but did not know what the rays were. She assumed that the rays came from the uranium itself instead of through different molecules interacting with each other. To study the rays, she used an instrument, called an electrometer, that studied the electricity that the rays passed through the air. Through this she was able to discover that the more uranium atoms there were in a compound, the stronger the rays that came off of it. She used this discovery to test other minerals that emitted more rays than Uranium, and discovered the elements Thorium, Polonium and Radium. Through her discoveries of these elements, scientists were able to find the structure of the atom and even how the rays can be used to fight cancer.
1. What was Marie Curies observation?
2. What was Marie Curies hypothesis?
3. What was Marie Curies experiment to prove her hypothesis?
4. What was the law Marie Curie discovered through her experiment?
5. What theories were formed from the law of Marie Curies experiments?
21. Kamal is a nurse that works in the ER. He knows the first thing he has to do is take the body temperature of each patient. He has learned from his studies that the normal body temperature is 37?C. If the body temperature is higher than 37?C, the patient has a fever, and if the body temperature is below 37?C, the patient has hypothermia. Help Kamal figure out if his patient is okay.
22. Lina is working through her homework assignment and is having trouble with working through some density equations. Help Lina with her homework. Use correct significant figures and make sure the units are correct. What is the volume of hydrogen if has a mass of 10.326g and a density of 0.089g/L?
23. Lina has worked hard to gather data for her experiments. With her last set of data she received, she is ready to publish her paper in a peer-reviewed journal. In order to do that, she has to make sure that all of her data has consistent SI units, significant figures and in scientific notation if necessary. Help Jessica get all of her data in order. How many significant figures are in 43.8lbs?
24 .Patient #3: Kamal read a body temperature of 308.15?K. Convert K to C and write whether the patient is normal, has a fever or has hypothermia. Use correct significant figures.
Dr. Henrietta Owusu was invited to give a presentation of her work at a medical conference. Her presentation encompassed explaining various properties of matter. At the presentation, she received a question to give examples to identify various intensive and extensive properties of matter. Help her identify the following properties below as intensive or extensive. Temperature.
Both
Extensive
Intensive
Neither
25. Dr. Henrietta Owusu was invited to give a presentation of her work at a medical conference. Her presentation encompassed explaining various properties of matter. At the presentation, she received a question to give examples to identify various intensive and extensive properties of matter. Help her identify the following properties below as intensive or extensive. Humidity.
Both
Extensive
Intensive
Neither
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