The switch is opened at t = 0 s. At what time has the charge on the capacitor decreased to 13% of its initial value? Express your answer using two significant figures. ► View Available Hint(s) t = V ΑΣΦ *** ? ms

Brightness  250+ 450+ 800+ 1100+ 1600+   Standard 25W 40W 60W 75W 100W   Assume your utility charges 5.5 cents per kWh, remember there are 100 cents in 1 dollar and 365 days in 1 year. With this info and the "how many lumens" chart, together with the data given in the tables on the next page you now have all the information to calculate your answers. Location  Lumens per bulb Watts per bulb  Total # of bulbs  Total Watts Use: hours per day kWh per day Total kWh for 1 year  Cost per 1 year  Cost per 10 years    Kitchen overhead  800 60 6 360 3 (360(3))/1000=1.08 394.2 $21.69 $216.90   Living room 1,600 100 3 300 4 (300(4))/1000=1.2 438       Dining Room  800   5   2

+ How a Real Voltmeter Works 4 of 20 I Review | Constants Part A Unlike the idealized voltmeter, a real voltmeter has a resistance that is not infinitely large. A voltmeter with resistance Ry is connected across the terminals of a battery of emf E and internal resistance r. Find the potential difference Vmeter measured by the voltmeter. • View Available Hint(s) ? Vmeter = Submit Previous Answers Part B Complete previous part(s) Next > Provide Feedback

When an ammeter is used to measure the current is in the circuit shown in (Figure 1 ), it reads 6 A. Part A What is the resistance of the ammeter if v₂ = 27 V? Express your answer to three significant figures and include the appropriate units. ▸ View Available Hint(s) Figure 2.516 Us is 4.80 16 1 of 1 με ? Rmeter 4.5 Ω Submit Previous Answers × Incorrect; Try Again; 2 attempts remaining Part B What is the percentage of error in the current measurement? Express your answer as a percentage to three significant figures. ▸ View Available Hint(s) % error = 40 ΜΕ ΑΣΦ Η vec Submit Previous Answers × Incorrect; Try Again; 5 attempts remaining < Return to Assignment Provide Feedback ? %