to what circuit element is an ideal inductor equivalent for circuits with constant currents and voltages?
1 answer:
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The resistance of the sample is
Explanation:
The relationship between resistance of a material and temperature is given by the equation
where
is the resistance at the temperature
is the temperature coefficient of resistance
For the sample of nickel in this problem, we have:
when the temperature is
While the temperature coefficient of resistance of nickel is
Therefore, the resistance of the sample when its temperature is
is
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Answer:
Truck's speed = 5.21 m/s
Car's speed = 20.2 m/s
Explanation:
Given:
Mass of truck = M = 1650 kg
Speed of the truck initially = U = 15 m/s
Mass of the car = m = 779 kg
Initial speed of the car =u = 0
From the momentum conservation, Total initial momentum = Total final momentum.
M V+m U = M V +m v
⇒ (1650)(15) + 779×0 = (1650)V + 779 v
⇒ 24750 = 1650 V+779 v →(1)
Since the collision is elastic, relative velocity of approach = relative velocity of separation. 15 = v - V
⇒ v =V + 15; This is now substituted in the equation(1) above.
24750 = 1650 V + (799) (V+15)
⇒ 24750 = 1650 V + 799 V + 11985
⇒ 2449 V = 12765
⇒ Final velocity of the truck = = 5.21 m/s
Final velocity of the car = v = V+15 = 5.21 + 15 = 20.2 m/s