Correct answer is first option: <span>The direction of the charge flow is the same as the question
Explanation:
When we have battery (or any other source of electricity) we have flow of a charge. Charge flows from positive part of battery over a conductor (most often it is a wire) towards negative part of battery. This is what always happens.
Now lets observe what we have done in this question. We had wires connected to a battery and we had a flow of charge from positive to negative pole. Then we disconnect wires and </span><span>reconnect them at the opposite ends of the battery. The question is does the direction of flow of charge change? Answer is NO. Charge still flows from positive towards negative pole. The direction of flow of charge does not depend on how the wires are connected.
Imagine this:
there is line of people stretching from one end of room to opposite end. You need to take something from front part to back part of room. Imagine people pass that object one to another. Does the direction in which this object moves depend on how this line of people is arranged? Same is for wire and charge.</span>
That's an urban legend that's been around for a long time.
It was tested on "Mythbusters". The conclusion was that
it would sting pretty good, and maybe raise a lump, but
it would never penetrate the skull, and it couldn't kill.
For physics, I would recommend to just keep doing practice problems and reviewing notes. Repetition of the same concepts will help drill it into your brain. Hope that helps!
1.358 J is the kinetic energy of the car driven by Mrs. Waid.
<u>Explanation:</u>
Given data:
Velocity at which Mrs. Waid drives her car = 80 mph
In order to convert mph (meter per hour) into mps (meter per second),
Car weighs 2500 lbs, means mass of the car, m = 2500 lbs
I kilo gram = 2.20462 pound
Therefore, 1 pound (lb)= 0.45359237 kilograms (kg).
To converting pounds into kilogram,
As we know, the kinetic energy can be defined as directly proportionate to the object’s mass (m) and square of its velocity (v). The expression can be given as below,
By substituting the given values, we get
