Answer:
dC = 72m < dA = 80m < dB = 90m
Explanation:
In order to calculate the distance traveled by each mobile, you use the following formula:
(1)
d: distance traveled
v: speed of the car
t: time of the motion
You replace the values of v and t for each mobile:
mobile A:
mobile B:
mobile C:
Then, you obtain that he distances traveled by the mobiles show:
dC = 72m < dA = 80m < dB = 90m
Answer:
A kilowatt (kW) is a unit of power.
Explanation:
The power of an object is given by :
Here,
E is the energy required
t is time
The SI unit of power is Watts and the SI unit of energy is Joule. the commercial unit of energy is kilowatt per hour.
Option (1) : A kilojoule (kJ) is a unit of power is incorrect.
Option (2) : A gigawatt (GW) is a unit of energy is incorrect.
Option (3) : A watt (W) is a unit of energy is incorrect.
Option (4) : A kilowatt x hour per year (kWh/yr) is a unit of energy is incorrect.
Option (4) : A kilowatt (kW) is a unit of power is correct.
Hence, the correct option is (d).