Answer:
b. electrons drift slowly toward the positive end of the wire
Explanation:
Motion of electrons constitutes current. According to Ohm's law, the current in the wire is directly proportional to the potential difference across the two ends of the wire.
I ∝ V
⇒V = I R
When potential difference is put, the electrons towards the positive end. Thus, option b is correct.
Weight is force.
The CGS unit of force is the dyne.
The SI unit of force is the Newton.
Before we solve, let's use our formula for speed.
Speed is defined as distance divided by time.
S = D/T
We have 119m and 28s.
Our distance is 119m.
Our time is 28s.
Plug these numbers into the formula.
S = 119/28
Divide 119 by 28 to get our speed.
119/28 = 4.25.
Our speed is 4.25 m/s.
I hope this helps!
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Answer:Due to change in direction
Explanation:
Given
Initially train has traveled a 100 km in North and after exchanging some railroad cars, it traveled 100 in south.
The velocity of the train changes as it direction of motion changes. Velocity is the vector quantity which require direction and magnitude for its reperesentation.