Homework Answers
13 Option b is correct option
14 Option C is correct
15. Option C is correct because only moving charge can produce magnetic field.
16. Option b is correct Because more UV will enter into atmosphere that will led to sunburn
17 Option C is correct
18 Option d is correct
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1/16/2019 13. In the u.S. AC line voltage oscillates at a frequency of a. S0 Hz...
1 1 J (Joule) corresponds to: A: 1.602E-19 eV B: 6.242E18 eV C: 6.242E-20 eV D: 1.602E10 GeV 2 A...
1 1 J (Joule) corresponds to: A: 1.602E-19 eV B: 6.242E18 eV C: 6.242E-20 eV D: 1.602E10 GeV 2 A force acting on an object always changes its: A: Total energy B: Kinetic energy C: Rest energy D: Momentum 3 Momentum is a product of: A: Rest mass and velocity B: Relativistic mass and velocity C: Kinetic energy and velocity D: Relativistic mass and total energy 4 Relativistic mass as a function of velocity is: A: Linearly increasing B: Linearly decreasing C: Non-linearly increasing D: Non-linearly decreasing 5 The Lorentz-factor (g) is a ratio of: A: Total...
1) Which of these scientists pioneered the study of electricity? A) Isaac Newton B) Galileo C)...
1) Which of these scientists pioneered the study of electricity? A) Isaac Newton B) Galileo C) Benjamin Franklin D) all of the above 2) The nucleus of an atom is charged A) positively B) negatively C) both of these D) none of the above 3) The electric charge of all electrons A) vary from atom to atom. B) vary from ion to ion. C) are identical. 4) Compared to the mass of a proton, the mass of an electron is...
1. A heat engine operates by taking in heat at a particular temperature and a. converting...
1. A heat engine operates by taking in heat at a particular temperature and a. converting it all into work b. exhausting some of it at a higher temperature c. exhausting all of it at a lower temperature d. converting some into work and exhausting the rest at a lower temperature 2. A refrigerator a. adds cold to a substance b. transfer heat from one location to another c. changes heat to cold d. removes cold from a substance 3....
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons . Which of the following would have the largest size? a) an atom b) a molecule c) a proton d) a neutron e) an electron 3. Isotopes of an element differ in the number of a) protons in the nucleus b) electrons in the nucleus © neutrons in the nucleus d) electron clouds e) energy levels they contain 4. VO The atomic number represents...
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...
1. Which of the following are the sites within the human body where carbon dioxide and...
1. Which of the following are the sites within the human body where carbon dioxide and oxygen are exchanged? A. Alveoli B. Arteries C. Synapses D. Venules 2. Which of the following describes the most important reason for repeating an experimental investigation? A. To verify the validity of the original findings B. To expand upon the original investigation C. To manipulate the independent variable D. To attempt to disprove the hypothesis 3. Lithium has an atomic number of 3 and...
1) Which of these scientists pioneered the study of electricity? A) Isaac Newton B) Galileo C) Benjamin Franklin D) all of the above 2) The nucleus of an atom is charged A) positively B) negatively C) both of these D) none of the above 3) The electric charge of all electrons A) vary from atom to atom. B) vary from ion to ion. C) are identical. 4) Compared to the mass of a proton, the mass of an electron is...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons . Which of the following would have the largest size? a) an atom b) a molecule c) a proton d) a neutron e) an electron 3. Isotopes of an element differ in the number of a) protons in the nucleus b) electrons in the nucleus © neutrons in the nucleus d) electron clouds e) energy levels they contain 4. VO The atomic number represents...
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...
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