Scientists develop theories to explain natural events. What causes scientists to reject even long-held theories and replace them
1 answer:
You might be interested in
The current is defined as the amount of charge Q that passes through a certain point of a wire in a time 
:
But the charge Q flowing in the wire is just the charge of a single electron, e, times the number of electrons N:
so the current can be rewritten as
Using
, 
(charge of one electron), and 
, we find the current:
Therefore correct answer is A).
But the charge Q flowing in the wire is just the charge of a single electron, e, times the number of electrons N:
so the current can be rewritten as
Using
Therefore correct answer is A).
Answer:
.
Explanation:
In a projectile motion, the kinetic energy (KE) of the projectile is converted to gravitational potential energy (GPE) and then from GPE back to KE.
In this example, the spring toy is the projectile. Refer to the diagram attached.
- The spring toy started with a velocity of
, meaning that its initial KE is non-zero.
- On the way up, the KE of this spring toy gets converted to GPE.
- At the top of the trajectory, the GPE of this toy is maximized while its KE is minimized (zero).
- As the toy returns to the ground, the GPE of this toy gets converted back to KE.
- The GPE of this toy is zero when the toy is on the ground.
In other words, the kinetic energy (KE) of this toy would be when it is at the top of the trajectory and GPE is maximized.
Since the KE of this toy at the top of the trajectory would be , the velocity of this toy at that moment would also be
.
