Answer:
Explanation:
Due to the law of conservation of energy, the energy of the emitted X-ray photon is equal to the energy lost by the electron.
The initial kinetic energy of the electron is:
The electrons decelerates to 3/4 of its speed, so the new speed is
So the final kinetic energy is
So, the energy lost by the electron, which is equal to the energy of the emitted photon, is
The wavelength of the photon is related to its energy by
where h is the Planck constant and c the speed of light. Substituting E, we find
All matter is made up of atoms
The mountains would be less steep and more rounded? What do you mean? I can try to help but you need to give me the question haha
Complete question is;
When you ride a bicycle, in what direction is the angular velocity of the wheels? A) to your left B) to your right C) forwards D) backwards
Answer:
Option A - to your left
Explanation:
While an object rotates, each particle will have a different velocity:
the 'Speed' component will vary with radius while the 'Direction' component will vary with angle.
All of the velocity vectors are aligned in the same plane.
We can be solve this by choosing a single vector normal to ALL of the possible velocity vectors of the rotating object in that plane.
This convention used is known as "Right-hand rule". The angular velocity vector points along the wheel's axle. For instance, if you Imagine wrapping your right hand around the axle so that your fingers point in the direction of rotation, with your thumb sticking out. You will notice that your thumb points to the left.
Thus;
By right-hand rule, a wheel rotating on a forward - moving bicycle has an angular velocity vector pointing to the rider's left.
So, option A is the correct answer
Answer:
no it gets it form the sun
Explanation:
