X-axis=time
y-axis=distance (position)
slope=y-axis / x-axis=distance / time=velocity.
answer: d) slope
Answer:
The time rate of change of the electric field between the plates is
Explanation:
From the question we are told that
The radius is
The distance of separation is
The current is
Generally the electric field generated is mathematically represented as
Where is the permitivity of free space with a value
So the time rate of change of the electric field between the plates is mathematically represented as
But
So
substituting values
Answer:
18.5 m/s
Explanation:
On a horizontal curve, the frictional force provides the centripetal force that keeps the car in circular motion:
where
is the coefficient of static friction between the tires and the road
m is the mass of the car
g is the gravitational acceleration
v is the speed of the car
r is the radius of the curve
Re-arranging the equation,
And by substituting the data of the problem, we find the speed at which the car begins to skid:
Answer:
Argument in favor of less total energy consumption if the store is kept at a low temperature
Explanation:
Have in mind that if the store has numerous refrigerators and freezers, the energy consumption of those machines have to be included into the analysis.
Recall that the efficiency (or Coefficient Of Performance - COP) of a frezzer or refrigerator is inversely proportional to the temperature difference between the inside of th machine and the environment where it is operation, therefore the smaller the difference, the highest their efficiency. Therefore, the cooler the environment (the temperature at which the store is kept) the better performance of the running refrigerators and freezers.