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ASTRO 101 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS.
In this diagram of an accretion disk, there are two particles of dust labeled "A" and "B". A is closer to the black hole, while B is further away. How do their orbital times (time to travel around the black hole) compare? A takes less time to orbit the black hole than B. How does material move inward through the accretion disc? Bits of material collide with each other, losing speed but creating heat that then radiates away. As they lose speed, they fall inward. Imagine ...
- Exam (elaborations)
- • 59 pages •
In this diagram of an accretion disk, there are two particles of dust labeled "A" and "B". A is closer to the black hole, while B is further away. How do their orbital times (time to travel around the black hole) compare? A takes less time to orbit the black hole than B. How does material move inward through the accretion disc? Bits of material collide with each other, losing speed but creating heat that then radiates away. As they lose speed, they fall inward. Imagine ...
FIRST ASTRO 101 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS.
Photon a particle of light with wavelength and frequency and thus energy Electromagnetic spectrum the range of wavelengths or frequencies over which electromagnetic radiation extends. Gamma rays Electromagnetic waves with the shortest wavelengths and highest frequencies Radio waves Electromagnetic waves with the longest wavelengths and lowest frequencies Emission spectrum a spectrum of the electromagnetic radiation emitted by a source. a gas is heated up to show this ...
- Exam (elaborations)
- • 15 pages •
Photon a particle of light with wavelength and frequency and thus energy Electromagnetic spectrum the range of wavelengths or frequencies over which electromagnetic radiation extends. Gamma rays Electromagnetic waves with the shortest wavelengths and highest frequencies Radio waves Electromagnetic waves with the longest wavelengths and lowest frequencies Emission spectrum a spectrum of the electromagnetic radiation emitted by a source. a gas is heated up to show this ...
AQA GCSE CHEMISTRY PAPER 1 AND 2 EXAMS. QUESTIONS WITH 100% CORRECT ANSWERS COVERING ALL TOPICS.
THE PACKAGE CONSISTS OF EXAMS COVERING ALL TOPICS IN AQA CHEMISTRY.
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- • 5 items •
- AQA CHEMISTRY PAPER 1 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS. • Exam (elaborations)
- AQA CHEMISTRY PAPER 2 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS • Exam (elaborations)
- AQA CHEMISTRY PAPER 2 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS. • Exam (elaborations)
- AQA CHEMISTRY PAPER 2 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS. • Exam (elaborations)
- AQA CHEMISTRY PAPER 2 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS. • Exam (elaborations)
THE PACKAGE CONSISTS OF EXAMS COVERING ALL TOPICS IN AQA CHEMISTRY.
AQA CHEMISTRY PAPER 2 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS.
Why do ionic compounds conduct electricity when molten or dissolved? Because the ions are free to move and carry charge. What is covalent bonding? Sharing of electrons between two non-metal atoms. Do covalent compounds conduct electricity? Why? No, because they don't have free charged particles. What is metallic bonding? Positive metal ions surrounded by a sea of delocalized electrons. Why are metals good conductors of electricity? Because the delocalized electrons in...
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- Exam (elaborations)
- • 17 pages •
Why do ionic compounds conduct electricity when molten or dissolved? Because the ions are free to move and carry charge. What is covalent bonding? Sharing of electrons between two non-metal atoms. Do covalent compounds conduct electricity? Why? No, because they don't have free charged particles. What is metallic bonding? Positive metal ions surrounded by a sea of delocalized electrons. Why are metals good conductors of electricity? Because the delocalized electrons in...
AQA CHEMISTRY PAPER 2 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS.
What color flame test for calcium go? Yellowy red What color flame test for copper go? Blue/ Green. What happens when you react aluminum with sodium hydroxide? White precipitate forms. Which dissolves in excess. What happens when you react calcium with sodium hydroxide? White precipitate forms. What happens when you react magnesium with sodium hydroxide? White precipitate forms. What happens when you react copper (II) with sodium hydroxide? Blue precipita...
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- Exam (elaborations)
- • 35 pages •
What color flame test for calcium go? Yellowy red What color flame test for copper go? Blue/ Green. What happens when you react aluminum with sodium hydroxide? White precipitate forms. Which dissolves in excess. What happens when you react calcium with sodium hydroxide? White precipitate forms. What happens when you react magnesium with sodium hydroxide? White precipitate forms. What happens when you react copper (II) with sodium hydroxide? Blue precipita...
AQA GCSE CHEMISTRY PAPER 2 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS.
NPK fertilizers use and makeup These are formulations made to improve agricultural productivity. They are made of salts of: - Nitrogen - Phosphorus - Potassium How to get nitrogen for NPK fertilizers Ammonia, produced in the Haber process, can react to form other nitrogen-containing compounds, e.g. reacting ammonia with oxygen and then water produces nitric acid. Ammonium salts are common compounds found in fertilisers - formed by reacting ammonia with acids. Ammonium nitrate is a use...
- Exam (elaborations)
- • 66 pages •
NPK fertilizers use and makeup These are formulations made to improve agricultural productivity. They are made of salts of: - Nitrogen - Phosphorus - Potassium How to get nitrogen for NPK fertilizers Ammonia, produced in the Haber process, can react to form other nitrogen-containing compounds, e.g. reacting ammonia with oxygen and then water produces nitric acid. Ammonium salts are common compounds found in fertilisers - formed by reacting ammonia with acids. Ammonium nitrate is a use...
AQA CHEMISTRY PAPER 2 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS.
Burning fossil fuels releases more CO2 Agriculture farm animals produce methane Creating waste - landfills waste contributes to CO2 build up Climate change consequences ice caps melt animals die weather changes temp changes Carbon footprints measure of the amount of greenhouse gases released by something over its lifetime. Air pollution pollutants: fossil fuels incomplete combustion - soot carbon monoxide release of sulfur dioxide and oxides of nitrogen ...
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- Exam (elaborations)
- • 44 pages •
Burning fossil fuels releases more CO2 Agriculture farm animals produce methane Creating waste - landfills waste contributes to CO2 build up Climate change consequences ice caps melt animals die weather changes temp changes Carbon footprints measure of the amount of greenhouse gases released by something over its lifetime. Air pollution pollutants: fossil fuels incomplete combustion - soot carbon monoxide release of sulfur dioxide and oxides of nitrogen ...
AQA CHEMISTRY PAPER 2 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS
Electroplating coating (a metal object) by electrolytic deposition with chromium, silver, or another metal. Carat a measure of the purity of gold, pure gold being 24 carats. Steels alloys of iron with carbon and/or other elements Carbon steels the simplest steels, alloys of steel with carbon. Stainless steels chromium-nickel steels that combine hardness and strength with great resistance to corrosion. Thermosoftening polymer polymers that soften when heated and har...
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- Exam (elaborations)
- • 29 pages •
Electroplating coating (a metal object) by electrolytic deposition with chromium, silver, or another metal. Carat a measure of the purity of gold, pure gold being 24 carats. Steels alloys of iron with carbon and/or other elements Carbon steels the simplest steels, alloys of steel with carbon. Stainless steels chromium-nickel steels that combine hardness and strength with great resistance to corrosion. Thermosoftening polymer polymers that soften when heated and har...
AQA GCSE CHEMISTRY PAPER 2 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS.
What is the advantage of borosilicate glass over soda-lime glass? Borosilicate glass melts at a higher temperature Give two examples of clay ceramics Pottery and bricks How are clay ceramics made? By shaping wet clay and then heating in a furnace What do the properties of polymers depend upon What monomers the polymer is made from and the conditions under which they are made Name the two polymers made from ethene Low density poly(ethene) (LDPE) and high density poly(ethe...
- Exam (elaborations)
- • 53 pages •
What is the advantage of borosilicate glass over soda-lime glass? Borosilicate glass melts at a higher temperature Give two examples of clay ceramics Pottery and bricks How are clay ceramics made? By shaping wet clay and then heating in a furnace What do the properties of polymers depend upon What monomers the polymer is made from and the conditions under which they are made Name the two polymers made from ethene Low density poly(ethene) (LDPE) and high density poly(ethe...
AQA GCSE CHEMISTRY PAPER 1 EXAM. QUESTIONS WITH 100% CORRECT ANSWERS.
Why must the anode be replaced regularly? The anode must be replaced regularly because the oxygen produced at the anode reacts with the carbon in the graphite forming carbon dioxide gas What are exothermic reactions? Exothermic reactions are reactions that transfer energy to their surroundings What happens to the temperature of the surroundings in an exothermic reaction? In an exothermic reaction the temperature of the surroundings gets increases Give three examples of exotherm...
- Exam (elaborations)
- • 52 pages •
Why must the anode be replaced regularly? The anode must be replaced regularly because the oxygen produced at the anode reacts with the carbon in the graphite forming carbon dioxide gas What are exothermic reactions? Exothermic reactions are reactions that transfer energy to their surroundings What happens to the temperature of the surroundings in an exothermic reaction? In an exothermic reaction the temperature of the surroundings gets increases Give three examples of exotherm...
NSG 4100 / NSG4100 NURSING PRACTICE ADULT HEALTH EXAM 2. QUESTIONS AND ANSWERS.
NUR 211 / NUR211 LIFESPAN FINAL EXAM. QUESTIONS WITH 100% VERIFIED ANSWERS.
NUR 211 / NUR211 LIFESPAN FINAL EXAM. QUESTIONS WITH 100% VERIFIED ANSWERS.
NUR 211 / NUR211 LIFESPAN FINAL EXAM. QUESTIONS WITH 100% VERIFIED ANSWERS.
NURS 110 / NURS110 MIDTERM EXAM. QUESTIONS AND ANSWERS.
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