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Which point is the intersection of the lines x y and x y


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1.​What is true about sample preparation for NMR? a. Samples for 13C NMR should be concentrated, and for 1H NMR should ...

d for 1H NMR should be dilute. b. Samples for 13C NMR should be dilute, and for 1H NMR should be concentrated. c. Samples for 13C NMR and 1H NMR should both be concentrated. d. Samples for 13C NMR and 1H NMR should both be dilute. 3. What is the proper way to dispose of an NMR sample that had deuterated chloroform (CDCl3) as the solvent? a. Placement down the drain. b. Placement in the non-halogenated organic waste container. c. Placement in the halogenated organic waste container. d. Placement in the oven for evaporation. 4. Which feature of a 1H NMR spectrum can provide information about the number of inequivalent kinds of hydrogen in the structure? a. chemical shift b. coupling c. integration d. None of the above. 5. Which feature of a 1H NMR spectrum can provide information about the number of neighboring hydrogens that a given hydrogen in the structure has? a. chemical shift b. coupling c. integration d. None of the above. 6. Which feature of a 1H NMR spectrum can provide information about the number of hydrogens responsible for each signal? a. chemical shift b. coupling c. integration d. None of the above 7. An unknown has a specific rotation (i.e., a rotation unequal to 0°) as measured with a polarimeter. What is true about the unknown? a. The structure contains at least one chirality center. b. The structure contains no chirality centers. c. The structure has a plane of symmetry. d. None of the above. 8. True or False: Conjugation increases the wavenumber of absorption in the IR spectrum. True False 9. What group classification does a solid unknown most likely belong to if its melting point is greater than 250 °C? a. carboxylic acid b. amino acid c. amine d. acid derivative 10. True or False: If a liquid unknown freezes when placed in an ice-water bath for 10 minutes, the melting point of the unknown is between 0 °C and 25 °C. True False
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2.2)Two books are accelerating to the right on a frictional surface and the coefficient of kinetic friction between the floor ...

ction between the floor and book is µk. Using the information given in the figure: (a) draw free body diagrams for both the books, and also for the combined system (of mass m1+m2), (b) find acceleration of the books along horizontal direction, and (c) find the magnitude and direction of the force exerted by the left book on the right book. 3.A car of mass 1500-kg enters a circular path at point P and leaves at point Q (see the figure) at constant speed of 5.0m/s, and the frictional force acting on its tires is 2500-N. a) how long it takes to reach point Q from point P, and b) what should be the minimum value of the coefficient of static friction between the tires and the road? 4)In an elevator which is accelerating downward at 2.5ms−2 , a 25-kg block hangs from a spring attached to the ceiling of the elevator. If spring gets stretched by 0.15m, find its spring constant.
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3.Choose one question and complete a 1.5 page essay. Your essay should be double-spaced, in Times New Roman 12 point font, ...

ew Roman 12 point font, and formatted according to MLA style. 3. For this particular essay prompt you are expected to reflect on the role that imagination plays in the works of at least two authors from the course. How does imagination impact the ways in which the author of the work, or the protagonist within the work, sees the world around them? How does this reflect their inner-state of being? Is this a calm or tumultuous state? Ultimately, what does this reflection say about the particular work and the underlying themes that it represents?
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4.1) Which of the following statements about scientific methods / theories is correct? (1/0/0) a) A scientific theory must be able to ...

a) A scientific theory must be able to be proven. b) A scientific theory has been derived from known facts and always applies. c) A scientific method should give different results depending on who performs the method. d) Knowledge of our surroundings usually emerges through an interplay between theory and experiment. 2) The sides of a straight block are measured to 3,202 cm; 0.0012 cm and 11.2 cm, respectively. Calculate the volume of the straightening block and enter it with the correct number of value digits. (2/0/0) Number of words: 0 3) A 9.2 dm long and evenly thick rod rests on a support. 0.55 dm from one end, a dynamometer is hung so that the rod will hang horizontally. Then the dynamometer shows 4.4 N. How much does the bar weigh? (1/1/0) Number of words: 0 4) A bar AB that is homogeneous and evenly thick has a length of 2.70 m and is rotatable about an axis at A. The bar weighs 25 kg and is kept in equilibrium by a force F which has its point of attack in B. is 45 degrees. How big is the force F? (1/1/0) Saved! 25 * 9.82 = 245.5 N Number of words: 6 5) A trolley rolls at a constant speed to the right. On the cart is an upward cannon that suddenly shoots a bullet. The carriage continues to the right with the same speed as before. Where does the bullet end up when it falls? For a detailed reasoning. (1/1/1) Number of words: 0 6) A river is 200 m wide. The water in the river flows at a speed of 2.5 m / s. A motorboat steers across the river at its maximum speed, which in stagnant water is 5.0 m / s. The boat is constantly heading perpendicular to the banks of the river. Where does the motorboat land on the other shore? (2/0/0) Number of words: 0 7) A ball with a mass of 2.0 hg moves at a constant speed in a circular path. The radius of the track is 1.5 m and it takes the ball 3.0 seconds to move one turn. How big is the centripetal force? (1/1/0) Number of words: 0 8) A bullet moves at a constant speed. Can we then safely say that the resultant of the forces acting on the bullet is zero? Motivate and discuss your answer. (0/1/1) Number of words: 0 9) A conductor is located between the poles of a permanent magnet. The current in the conductor goes in the direction of the plane of the paper (away from the reader). How is the force acting on the leader directed? (1/0/0) a) To the right of the figure b) To the left in the figure c) Downwards in the figure d) Upwards in the figure 10) Protons enter horizontally from the left between two large metal plates at a speed v = 0.80 Mm / s. The plates are connected to a voltage source with the pole voltage U. Between the plates there is a homogeneous magnetic field with a flux density of 38 mT directed perpendicular to the plane of the paper. The distance between the plates is 1.5 cm. They want the protons to continue with unchanged direction and speed between the plates. Which of the plates should be connected to the positive pole of the voltage source and how large should the voltage U be? (0/2/0) Number of words: 0 11) The magnetic flux Φ through a 700-speed coil decreases linearly with time according to the diagram below. Calculate the voltage across the coil at time t = 1.0 ms. 12) The current in a coil with an inductance of 35 mH has a growth rate of 6.2 A / s at a given moment. What is the instantaneous value of the ems induced in the coil?
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5.Q2.BMPractice.5th Your email address ( will be recorded when you submit this form. Not you? Switch account * Required Write your FIRST name: ...

Not you? Switch account * Required Write your FIRST name: * Write your LAST name: * 1. Which best describes the difference between single cell and multicellular organisms? * 1 point a. Single-cell organisms can perform all processes in one cell, but multicellular organisms need many cells to do specialized functions together. b. Single-cell organisms need one cell to function, but multicellular organisms need lots of cells who all have the same job. c. Single-cell organisms need many cells to do specialized functions together, but multicellular organisms can perform all processes in one cell. d. Single-cell organisms need multiple cells with similar structures, but multicellular organisms need only one cell. 2. How does your brain move your arm? * 1 point a. The brain sends a message to your bones to move your arm b. The brain sends a message to your nerves to move your arm c. The lungs send a message to your muscles d. The muscles send a message to your brain 3. Which correctly explains the difference between the respiratory and circulatory system? * 1 point a. The respiratory system includes your lungs and the circulatory system includes your heart b. The respiratory system takes in oxygen and the circulatory system breaks down food c. The respiratory system takes in water and carbon dioxide, but the circulatory system does not d. The respiratory system includes the brain and the circulatory system includes to lungs 4. Which of the following is a learned behavior? * 1 point a. Dimples when you smile b. Ability to sing c. Freckles d. Hair color 5. These are all examples of: * 1 point Captionless Image a. Evaporation b. Radiation c. Transpiration d. Percipitation 6. Which of these does NOT make a new material? * 1 point a. Burning a wooden log b. Iron nail rusitng c. Ice melting d. Mysterious color change Explain why: * This is a required question 7. What would you want to put your drink it to keep it cold? * 1 point Metal (good conductor) Plastic (bad conductor) Explain why: * 8. How does the sun play a role in the water cycle? * 1 point a. Heats water and turns it into water vapor gas b. Cools gas to make water droplets and clouds c. Creates strong winds d. Causing it to rain 9. What will happen when a metal chair is left outside in the hot sun? * 1 point a. Increase in weight b. Decrease in weight c. Increase in size d. Decrease in size 10. What would the weight of the lemonade be if the water is 3.0 grams, the ice is 2.5 grams, and the mixture is 0.25 grams? * 1 point a. 5.75 g b. 5 g c. 6.25 g d. 10.1 g
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6.You are boiling water on the stove, in order to cook pasta. You need to heat 1.2 kg of water ...

e room temperature of 25°C to the boiling point of water, which is 100°C. However, the stainless steel pot that the water is in will also heat up from 25°C to 100°C. This pot has a mass of 2 kg. The specific heat of water is 4181 Joules/kg - °C and the specific heat of stainless steel is 502 Joules/kg - °C. How much heat does the stove need to apply solely to the combination of the pot and the water in joules?
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7.Rectangle LMNO is translated using the rule (x, y) → (x + 2, y + 2) to create rectangle L'M'N'O'. ...

If a line segment is drawn from point L to point L' and from point O to point O', which statement would best describe the relationship between segment L L prime and segment O O prime? They share the same midpoints. They are diameters of concentric circles. They are perpendicular to each other. They are parallel and congruent.
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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

mathematicsalgebra Physics