Question

Passenger vehicles with a capacity of more than 12 persons should have:

a. Lights that illuminate the passenger aisle behind the driver.
b. Inside lights that should be left on all the time.
c. Inside lights that should be on between sunset and sunrise.
d. a. and c. are correct.

Answer 1

The driver concluded that the car's headlights would last for approximately 15 hours when left on, after calculating based on the battery's capacity (100 Ah) and the headlights' power rating (2 x 40 W).

Step-by-step explanation:

The student asked about the duration that the headlights of a car would last if left on, given a specific battery capacity and the power rating of the headlights. To solve this problem, one must first calculate the total power consumption by adding the power draw of both headlights. With two 12-V headlights each rated at 40 W, the total power consumption would be 80 W (40 W + 40 W). The battery capacity is 100 Ah (Ampere-hours), and at 12 V, this results in a total energy storage of 1200 Wh (Watt-hours).

Calculating the duration for which the headlights can be on uses the formula for time which is Energy (Wh) / Power (W). This gives us 1200 Wh / 80 W, which equates to 15 hours. Therefore, the driver concluded that the headlights would last for approximately 15 hours before the battery would be drained.