Kim travelled at a speed if 18km/h for two hours. What was the distance covered?
1 answer:
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According to Ohm's Law:
Where: V = Voltage
I = Current
R = Resistance
As you can see here, you can say that Current is directly proportional to Voltage and indirectly proportional to Resistance. This means that as the voltage increases, current increases and as the resistance increases, current decreases.
So in your scenario, if the voltage remains the same, but the resistance is doubled, that means that the current will be halved. So the answer to your question is 2. the current will drop to half of its original value.
Where: V = Voltage
I = Current
R = Resistance
As you can see here, you can say that Current is directly proportional to Voltage and indirectly proportional to Resistance. This means that as the voltage increases, current increases and as the resistance increases, current decreases.
So in your scenario, if the voltage remains the same, but the resistance is doubled, that means that the current will be halved. So the answer to your question is 2. the current will drop to half of its original value.
Answer:
249.5 minutes
Explanation:
Ali's speed is given by:
where
d is the distance covered
t is the time taken
We know that he can run d = 12 mi in t = 114 min, so he can keep a speed of
The length of a maraton is
L = 26.2 miles
So we can find the time it takes for Ali to complete the marathon as follows
Answer:
n = 1.7*10²² electrons.
Explanation:
- As the current, by definition, is the rate of change of charge, assuming that the current was flowing at a steady rate of .151 A during the 5 hours, we can find the total charge that passed perpendicular to the cross-section of the circuit, as follows:
⇒ Δq = I * Δt = 0.151 A * 18000 s = 2718 C
- As this charge is carried by electrons, we can express this value as the product of the elementary charge e (charge of a single electron) times the number of electrons flowing during that time, as follows:
Δq = n*e
- Solving for e: