Answer:
The velocity at B is
The velocity at C is
Explanation:
From the question we are told that
The mass of the bead is
The first height is
The second height is
The initial speed of the bead is
According to the law of energy conservation
Now is the kinetic energy at A and it is mathematically represented as
is the potential energy at A which is mathematically represented as
is the kinetic energy at B which is mathematically represented as
Where v is the speed of the bead at B
is the potential energy at B which equal to 0 because height is 0 at B
So
Making v the subject
substituting values
According to the law of energy conservation
So
is the kinetic energy at c which is mathematically represented as
is the potential energy at C which is mathematically represented as
So
making the subject
Answer:
Part A: The current is shown in milliamps because the values of current in this circuit are very small.
Part B: The value of the current also increases when the voltage increases.
Part C: The value decreases When the resistance increases.
Explanation: First answer is straight from Edmentum/Plato. B, C are rewritten Hope it helped!
Answer:
The mass of the copper is 3.00kg
Explanation:
The apparent velocity is B) 48 m/s north
Explanation:
Here we have a problem of relativity of velocities.
In fact, the train is travelling north at a speed of
where this velocity is measured with respect to the ground.
At the same time, a passenger on the train is walking towards the rear (so, south) at a velocity of
where this velocity is measured with respect to the train, which is in motion in the opposite direction.
Therefore, the apparent velocity of the passenger with respect to an observer standing on the ground is:
And the direction is north, since this number is positive.
Learn more about velocity:
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