he figure (Figure 1) shows a simplified circuit for a photographic flash unit. This circuit consists of a 9.0-battery, a 50.0 resistor, a 140 capacitor, a flashbulb, and two switches. Initially, the capacitor is uncharged and the two switches are open. To charge the unit, switch is closed; to fire the flash, switch (which is connected to the camera’s shutter) is closed. How long does it take to charge the capacitor to 6.0 ? (seconds) Express your answer using two significant figures.