Answer:
The new kinetic energy would be 16 times greater than before.
Explanation:
Kinetic energy is found using this formula:
- KE = 1/2mv²
- where KE = kinetic energy (J), m = mass (kg), and v = velocity (m/s)
We can see that kinetic energy is directly proportional to the square of the velocity, meaning that if the speed was increased by 4 times, then the kinetic energy would get increased by a factor of 16.
The velocity just before the ball hits the ground can be found by the equation:
Let's substitute h = 10 m and h = 40 m into this formula.
We can see that the velocity increases by a factor of 4 (10 m → 40 m).
Therefore, this means that the kinetic energy would also be increased by a factor of (4)² = 16. Thus, the answer is D) The new kinetic energy would be 16 times greater than before.
I will try to define the net problem, without the intermediate message between the message as:
<em>An air-filled toroidal solenoid has a mean radius of 15.5 cm and a cross-sectional area of 4.95 cm2 . When the current is 12.5 A , the energy stored is 0.390 J . </em>
<em>Part A: How many turns does the winding have?</em>
To solve the problem it is necessary to apply the concepts related to the storage of energy in an inductor and how it is possible to calculate from the inductance the number of turns of the system.
By definition we know that the energy stored in an inductor is given by,
Where,
L = Inductance
I = Current
In this way, clearing the Inductance in the previously given equation we have to
In a system the inductance is given by
Where l represents the length, however as we deal with the perimeter of a circle we have,
Replacing our values we have
Re-arrange to find N,
Therefore the winding have 2211turns
Answer:
independent
Explanation:
Choose your x and y carefully. Scientists like to say that the “independent” variable goes on the x-axis (the bottom, horizontal one) and the “dependent” variable goes on the y-axis (the left side, vertical one).
An indicator of average kinetic energy is temperature. Temperature is directly proportional to the average kinetic energy of the molecules in a substance.<span> If the degree of motion of the molecules inside an object doubles, the temperature will also double. Hope this answers the question.</span>