In very rough numbers, galaxies have a mass of 10 billion solar masses (Mo), there are 100 billion galaxies in the Universe, and the Universe is 13 billion light-years in radius. From such estimates,...
In very rough numbers, galaxies have a mass of 10 billion solar masses (Mo), there are 100 billion galaxies in the Universe, and the Universe is 13 billion light-years in radius. From such estimates, calculate how many protons there are in the Universe, how many electrons, and how many neutrons.
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In very rough numbers, galaxies have a mass of 10 billion solar masses (Mo), there are 100 billion galaxies in the Universe, and the Universe is 13 billion light-years in radius. From such estimates,...
1) The missing mass problem is a) starlight is observed, but there is no evidence of...
1) The missing mass problem is a) starlight is observed, but there is no evidence of mass b) the amount of mass measured is less than the amount of light measured c) starlight follows the same distribution as mass d) there are indications of mass from motion but no light e) spacetime is warped by mass 2) The rotation curve of the Galaxy is a) flat in the core, planet-like in the disk b) wheel-like in the core, flat in...
#3. a) The human brain, assuming it were approximately spherical, would have a radius of about 6.7 centimeters and a mass of about 1.5 kilograms. Given these values, there is a number such that, simp...
#3. a) The human brain, assuming it were approximately spherical, would have a radius of about 6.7 centimeters and a mass of about 1.5 kilograms. Given these values, there is a number such that, simply by actually storing this number in your brain (a.k.a "just thinking it"), your brain should immediately collapse into a black hole. Calculate this number (don't worry, you're only going to represent it with some symbols, like how there's no danger in writing ). b) The...
8. Three different modes of vibration of a water molecule are shown. Which of these modes...
8. Three different modes of vibration of a water molecule are shown. Which of these modes of vibration contributes to the greenhouse effect? Explain. (2pt) 9. Silver has an atomic number of 47. (2pt) a. Give the number of protons, neutrons, and electrons in a neutral atom of the most common isotope, Ag-107. b. How do the numbers of protons, neutrons, and electrons in a neutral atom of Ag-109 compare with the of Ag-107? 10. Termites possess enzymes that allow...
A generation is about one-third of a lifetime. Approximately how many generations have passed since the...
A
generation is about one-third of a lifetime. Approximately how many
generations have passed since the year 0 AD?
The answer is 10^2 generations. I don’t understand how they
got this answer.
We are viewing this in the order of magnitude
Length in Meters (m) Masses in Kilograms (kg) Time in Seconds (s) 10-15 m diameter of proton 10-14 m diameter of large nucleus 10-27 kg- mass of proton 10-10 m diameter of hydrogen atom 10-15 kg mass of bacterium...
choose correct answer. no explanation needed QUESTION 10 How do astrophysicists account for neutrino emission from...
choose correct answer. no explanation needed
QUESTION 10 How do astrophysicists account for neutrino emission from the Sun? Solar flares create neutrinos with very energetic magnetic fields. Convection releases neutrinos, which random walk through the radiation zone. Fission in the Sun's core creates neutrinos when protons turn into neutrons. The annihilation of positrons and electrons in the core produces neutrinos. Fusion in the Sun's core creates neutrinos when protons turn into neutrons, QUESTION 11 How does the interstellar medium impact...
Question 1 What is the net electric charge (in units of e) of an atom of...
Question 1 What is the net electric charge (in units of e) of an atom of lead (Z82)? qlead exact number, no tolerance Attempts: 0 of 5 used Question 2 Suppose a lithium atom (Z units of e? 3) has been singly ionized. What is the net electric charge of the resulting lithium ion in lithium exact number, no tolerance Attempts: 0 of 5 used Question 3 Suppose a lead atom (Z = 82) has been doubly ionized. What is...
#2 please ! Ro le Astronomy 1F03 Problem Set 3 Thursday, Nov 10th, 2019 Write your...
#2 please !
Ro le Astronomy 1F03 Problem Set 3 Thursday, Nov 10th, 2019 Write your answers on a separate sheet and show your work 1. The protesproton chain effectively c erta hyre en into hem according to 4 He. A Helium wus weighs 6.64518 x 10 IT kg and Hydrogen mucha proton) welches 1.67262 x 10 Workout the change in a when I kg of Hydrogen is converted completely into Helium 4. Convert the change in mass Per burning...
please complete the questions has not answering with clarification of the answer to any page Name...
please complete the questions has not answering with
clarification of the answer to any page
Name Lab Section _Date The Mole Concept and Atomic Weights The purpose of this activity is to better understand the concepts of relative atomic mass, counting by weighing and the mole. Percent composition and average atomic mass are included. Part I. Relative Atomic Masses and the Mole - Early Method When John Dalton proposed his atomic theory, he stated that the atoms of each element...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
All of the following questions are in relation to the following journal article which is available...
All of the following questions are in relation to the following journal article which is available on Moodle: Parr CL, Magnus MC, Karlstad O, Holvik K, Lund-Blix NA, Jaugen M, et al. Vitamin A and D intake in pregnancy, infant supplementation and asthma development: the Norwegian Mother and Child Cohort. Am J Clin Nutr 2018:107:789-798 QUESTIONS: 1. State one hypothesis the author's proposed in the manuscript. 2. There is previous research that shows that adequate Vitamin A intake is required...
#3. a) The human brain, assuming it were approximately spherical, would have a radius of about 6.7 centimeters and a mass of about 1.5 kilograms. Given these values, there is a number such that, simply by actually storing this number in your brain (a.k.a "just thinking it"), your brain should immediately collapse into a black hole. Calculate this number (don't worry, you're only going to represent it with some symbols, like how there's no danger in writing ). b) The...
8. Three different modes of vibration of a water molecule are shown. Which of these modes of vibration contributes to the greenhouse effect? Explain. (2pt) 9. Silver has an atomic number of 47. (2pt) a. Give the number of protons, neutrons, and electrons in a neutral atom of the most common isotope, Ag-107. b. How do the numbers of protons, neutrons, and electrons in a neutral atom of Ag-109 compare with the of Ag-107? 10. Termites possess enzymes that allow...
A
generation is about one-third of a lifetime. Approximately how many
generations have passed since the year 0 AD?
The answer is 10^2 generations. I don’t understand how they
got this answer.
We are viewing this in the order of magnitude
Length in Meters (m) Masses in Kilograms (kg) Time in Seconds (s) 10-15 m diameter of proton 10-14 m diameter of large nucleus 10-27 kg- mass of proton 10-10 m diameter of hydrogen atom 10-15 kg mass of bacterium...
choose correct answer. no explanation needed
QUESTION 10 How do astrophysicists account for neutrino emission from the Sun? Solar flares create neutrinos with very energetic magnetic fields. Convection releases neutrinos, which random walk through the radiation zone. Fission in the Sun's core creates neutrinos when protons turn into neutrons. The annihilation of positrons and electrons in the core produces neutrinos. Fusion in the Sun's core creates neutrinos when protons turn into neutrons, QUESTION 11 How does the interstellar medium impact...
Question 1 What is the net electric charge (in units of e) of an atom of lead (Z82)? qlead exact number, no tolerance Attempts: 0 of 5 used Question 2 Suppose a lithium atom (Z units of e? 3) has been singly ionized. What is the net electric charge of the resulting lithium ion in lithium exact number, no tolerance Attempts: 0 of 5 used Question 3 Suppose a lead atom (Z = 82) has been doubly ionized. What is...
#2 please !
Ro le Astronomy 1F03 Problem Set 3 Thursday, Nov 10th, 2019 Write your answers on a separate sheet and show your work 1. The protesproton chain effectively c erta hyre en into hem according to 4 He. A Helium wus weighs 6.64518 x 10 IT kg and Hydrogen mucha proton) welches 1.67262 x 10 Workout the change in a when I kg of Hydrogen is converted completely into Helium 4. Convert the change in mass Per burning...
please complete the questions has not answering with
clarification of the answer to any page
Name Lab Section _Date The Mole Concept and Atomic Weights The purpose of this activity is to better understand the concepts of relative atomic mass, counting by weighing and the mole. Percent composition and average atomic mass are included. Part I. Relative Atomic Masses and the Mole - Early Method When John Dalton proposed his atomic theory, he stated that the atoms of each element...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
All of the following questions are in relation to the following journal article which is available on Moodle: Parr CL, Magnus MC, Karlstad O, Holvik K, Lund-Blix NA, Jaugen M, et al. Vitamin A and D intake in pregnancy, infant supplementation and asthma development: the Norwegian Mother and Child Cohort. Am J Clin Nutr 2018:107:789-798 QUESTIONS: 1. State one hypothesis the author's proposed in the manuscript. 2. There is previous research that shows that adequate Vitamin A intake is required...
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