Density = mass / volume
19.3 = 13 / m
m = 13 / 19.3
m = 0.67g
The average speed of the family : 70 km/h
<h3>Further explanation</h3>
Given
time = 2 hour
distance = 140 km
Required
The average speed
Solution
Distance is the length traveled by an object within a certain time
Average speed = total distance/total amount of time
Can be formulated :
Avg speed = d : t
Total distance traveled : 140 km
Total time : 2 hr
Avg speed = 140 : 2 = 70 km/h
The correct answer to this question is letter "B. the battery
."
Attached to this answer is an image that shows the connection of the battery to the switch to the bulb.
There exists the same question from other source with the following choices:
<span>A. the wires
B. the battery
C. the switch
D. the light bulb</span>