You drive 3 hours at 50 mph and then 11 hours at 70 mph. What is your average velocity in miles per hour?
1 answer:
The average speed of the car is 65.71 mph.
The given parameters;
initial speed of the car, u = 50 mph
time of motion, t = 3 hours
final speed of the motion, v = 70 mph
time of motion, t = 11 hours
The average speed of the car is calculated as follows;
Average speed = total distance divided by the total time of motion.
The total distance = (50 x 3) + (70 x 11) = 920 miles
The total time of motion, = (3 + 11) = 14 hours.
The average speed of the car is;
Thus, the average speed of the car is 65.71 mph.
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According to Ohm’s law, the ratio of voltage to current in a conductor is constant.
Answer: Option A
<u>Explanation:</u>
Ohm's law defines that an electric current flowing through the conductor between two ends is directly proportionate to the voltage at these two points. The introduction of a constant proportionality, resistance, gives a simple mathematical equation describing this relationship. Particularly, Ohm's law also mentions that R is constant in this respect, i.e. not dependent on the current.
Where,
I is the current conduction in amperes
V is the voltage calculated by the conductor in volts
R is the conductor’s resistance in ohms.