Question ) An open-ended manometer is connected to a sample of pure argon gas in a 250.0 mL flask. Atmospheric pressure is 758.2 mmHg at 24 °C. The manometer’s mercury in the arm attached to the gas is 15.4 mmHg lower than in the arm open to the atmosphere. Draw a picture of the manometer/flask set up in question #3 and explain how to determine the pressure of the argon gas in the flask. How many grams of argon are in the flask?

Interactive Example 3.9 - Calculating Mass Percent Carvone is a substance that occurs in two forms having different arrangements of the atoms but the same molecular formula (C H 0) and mass 10 14 One type of carvone gives caraway seeds their characteristic smell, and the other type is responsible for the smell of spearmint oil Compute the mass percent of each element in carvone

Solve using cosine. Q4: (A-1, 6-1) For the lines - 3y + 6 = 0 and x + 2y - 7 = 0, do Determine the acute angle I – Determine parametris equations for each of the following lines

Carla Vista, Inc., is a leading manufacturer of sporting equipment. The company is in the process of evaluating the best use of its Plastics Division, which is currently manufacturing molded fishing tackle boxes. The company manufactures and sells 12,000 tackle boxes annually, making full use of its available capacity. The selling prices and costs of the tackle boxes are as follows: $87.00 $17.74 18.45 6.83 Selling price per box Costs per box Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Variable selling & administrativeb Fixed selling & administrative Total cost per box Profit per box 5.68 11.63 7.13 67.46 $19.54 Allocated to products based on expected production volume. bPer unit variable selling and administrative costs are the same for all products. Managers believe they could sell 15,000 tackle boxes if the company had sufficient manufacturing capacity. Rod-N-Reel has offered to supply 10,000 tackle boxes per year at a price of $73 per box, including delivery to Carla Vista's facility. Cedric Smith, Carla Vista's product manager, believes the company could make better use of its plastics department by manufacturing skateboards. A marketing report indicates that 18,700 skateboards could be sold at a price of $53 each. Variable costs to make the boards would be $25.90 per board. Carla Vista has three options: 1. Make and sell 12,000 tackle boxes. 2. Make 12,000 tackle boxes, buy 3,000 additional tackle boxes, and sell 15,000 tackle boxes. 3. Make and sell 18.700 skateboards, and buy and sell 10,000 tackle boxes. Compare the company's operating income under the three options. (Round price per box to 2 decimal places, e.g. 12.25 and all other answers to 0 decimal places, e.g. 125. Do not leave any answer field blank. Enter for amounts.) Option 1: Per unit $ $ > $ < << $ $ Option 2: Regular (Per unit) Outsourced (Per unit) Total $ $ $ $ Units sold $ $ $ Total contribution margin $ Option 3: Tackle boxes (Per unit) Skateboards (Per unit) Total $ $ Units sold Total contribution margin $ $ $

Activity 2 (If you want to reset the screen, click on the orange circle arrow in the bottom right corner. Do this before each activity) How can you make a charge of +2q? How can you make a charge of -3q? (Hint: You can place charges on top of each other. For example, 3 charges on top of each other gives you a +3q charge). Determine what charges (magnitude and positive/negative) would give you the electric field lines shown below? (You may need to try different combinations to determine the magnitudes of each charge.) When you have two opposite but equal magnitude charges along a horizontal line (similar to the picture above), where is the electric field the greatest? Is there ever a point where the field will be zero? When you have two of the same charges along a horizontal line, where is the electric field the greatest? Is there ever a point where the field will be zero? Determine what charge/charges (magnitude and positive/negative) would give each the lines of equipotential shown below? (For each situation, turn the ‘Electric Field’ on and off to see how the electric field lines compare to the equipotential lines) ) b) c) d) When you have two opposite but equal magnitude charges along a horizontal line (similar to the picture above), where is the potential the greatest? Is there ever a point where the potential will be zero? When you have two of the same charges along a horizontal line, where is the potential the greatest?

University Physics II Online Lab 1 1. Open the simulation Charges and Fields and play with it for a while. Activity 1 2. Reset by clicking the orange circle-arrow in the lower right. From the box at the bottom of the screen, drag a +1 nC charge and place it onto the middle of the screen. Check the boxes for Grid and Values. 3. If not already selected: Select ‘Electric Field'. How does the brightness of the arrow relate to the strength of the field? What happens when you checkuncheck 'Direction only'? Which way do the arrows point for a positive charge? 4. Drag the red –1 nC charge back into the box at the bottom, and then drag a blue - 1 nc charge onto the screen. Which way to the electric field arrows point for the negative charge? 3. Click on the yellow Sensor at the bottom and drag it across the electric field. What information does the sensor show? 6. What happens to the electric field as you move further from the charges? 7. Take the Voltage meter labeled "0.0 V and has a pencil and eraser) and drag it onto the screen. What information does the Voltmeter give? What information is given when you click on the pencil (you should see a green circle)? What does the green circle represent? Activity 2 (You can reset the screen by clicking on the orange circle-arrow in the bottom right. Do this before each activity.) 8. How can you make a charge of +2 nC? Can you make one of -3.0 nC? 9. Determine what charges (magnitude and sign) would give you the electric field lines shown in the figure. 10. When you have two opposite sign but equal magnitude charges along a horizontal line (similar to the picture above) where is the electric field the greatest? Is there ever a point where the electric field is zero? 11. When you have two like sign and equal magnitude charges along a horizontal line where is the electric field the greatest? Is there ever a point where the electric field is zero? 12. Determine what charge or charges (magnitude, positive or negative) would give the equipotential lines shown in the figures below. (for each figure turn the 'Electric Field' on/off to see how the electric field lines compare to the equipotential lines). Record you answers below. (c) (a) (d) •• Бу 13. When you have two opposite but equal magnitude charges along a horizontal line, (similar to (above) where is the potential (voltage) the greatest? Is there ever a point where the potential is zero? 14. When you have two like sign and equal magnitude charges along a horizontal line, (similar to (d) above) where is the potential (voltage) the greatest? Is there ever a point where the potential is zero? Activity 3 15. Make a long vertical line of positive charges by placing them very close together as shown in the picture. How does the electric field change as you move around the line of charges? 16. Make a long vertical line of negative charges 2 meter from the positive charges similar to what's shown below. This is your parallel-plate capacitor. How does the strength of the electric field change between the two lines? How does the direction of the electric field change between the two plates? 17. Place sensors at 3 different locations between the lines to get readings of the electric field, each at different distances from the lines. 18. Use the Voltmeter to draw lines of equal potential at the locations of the three sensors by clicking on the pencil button on the voltmeter. When you have the voltmeter at each distance, click this button. Doing so will record the potential V and draw a green line on the screen. Include a screenshot of your capacitor with 3 sensors and 3 green lines/circles. 19. Fill in the table below for each of the location. (you may need to move the sensors to see the potentials) Electric field E (V/m) Electric potential V (V) Location Distance from Positive plate (m) 1 2 2 Activity 4 20. Create a point charge of -6 nC by carefully placing six +1 nC charges on top of each other, somewhere on the grid at an intersection so there is enough room for you to measure 8 m away. 21. From the box at the bottom, drag a Sensor and place it 1 m to the right of your charge. This sensor measures the E field at the location of its placing. In the table at right, record the field magnitude at a distance r of 1 m. Ignore the degrees. Then move the sensor and complete the table. E (V/m) (m) 1 2 3 4 5 6 7 8 22. Drag your sensor back to the bottom of the screen. 23. Using the voltmeter record the potential V by drawing a green line on the screen at each distance. Fill in the table at the far right. Include a screenshot with all of the green circles. V(V) r (m) 1 2 3 4 5 6 7 8 24. Write the equation for the electric field at any distancer from a point charge with charge g. 25. Write the equation for the potential at any distance r from a point charge g. 26. Using the table above, make a graph in Excel of the electric field E and distance r to determine the coulomb constant k using the appropriate trendline. (Hint: there are two ways to do this. Either make a graph and then create the appropriate trendline, or figure out how to make the graph into a straight line (v = mx + 5) then use a linear fit. Once you have the trendline, compare the equation written above to the equation of the trentline to find k.) 27. Include the graph with your report and write down the value for k that you found from your graph. Compare to the given value of 0.0 x 10'Vm C using percent error. 28. Repeat for the table for Vvs r and again find t and percent error (include this graph as well.)

A 200-N force is applied as shown to the bracket ABC. Determine the moment of the force about A.