QUESTION 2 The lab this week will use a 25 W light bulb to heat a beaker of water. The temperature of the water is monitored by a thermometer and the readout is shown on the screen. As time goes on, the temperature of the water goes up. 10.3 m Frame 308 9.5 fps Temperature 22.1 .C AINTLLAB" 60x fast motion pivot interactives We cannot measure heat directly, but we can use the power of the lightbulb to find the heat added. Which of the following expression relates heat to power? Oat= Q-P O b. P =- O c. PQ =t O d. P = QtQUESTION 3 If you solve the above equation for heat, and substitute it into the relationship between heat and temperature, which equation below would you get. O a. Pt= mc A T O b. A U = Pt - W O c. Pt = + ml O d. Pt= + ml QUESTION 4 You can measure time and temperature in the video. (There is also a balance on the left that you use to measure the mass of the water.) When in the video would make the most sense for at time of 0 s? O a. When the water is poured O b. When the bulb is placed in the water O c. At the start of the video O d. When the bulb is turned onQUESTION 5 You're going to test the relationship between the the time the lightbulb is on, t, and the change in temperature of the water, AT. Describe the graph you should make of these two quantities. Which quantity will go on which axis? Explain your answer. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac) BIUS Paragraph Arial 10pt v EVALVIX E E X2 X2 V V X EXE TT ( } O (? + P QUESTION 6 Based on the theoretical equation, what kind of fit should you use for this data? O a. Inverse |y =_ O b. Inverse Square y = A O c. Quadratic (y = Ax2 + Bx + C) O d. Linear (y = Ax + B)QUESTION 7 Describe how you will use the fit constant A to determine the specific heat capacity of water. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph Arial 10pt EV v A v TX E V X EXE O (? P QUESTION 8 After you measure the specific heat of the water, you will be asked to compare your experimental value to the accepted value. Which of the options would you use to make this comparison? O a. Taking the difference between the values is fine. O b. Percent error O c. Percent difference