Rutherford overturned Thomson's model in 1911 with his well-known gold foil experiment in which he demonstrated that the atom has a tiny and heavy nucleus. Rutherford designed an experiment to use the alpha particles emitted by a radioactive element as probes to the unseen world of atomic structure.
Answer:
A. Brahe and Kepler
Explanation:
The Copernican model was a heliocentric model of the universe. Copernicus thought that the Sun is stationary, and the Earth and the other planets are orbiting around it. He also noted that the stars are further away from the Sun compared to the distance between the Earth and the Sun. Three very important hings in his theory are that he thought that the Earth rotates around its own axis, revolves around the Sun, and has annual tilting of its axis. At some things, Copernicus was right with his theory, at some he wasn't, but anyway he made one giant step forward in the understanding of the universe. His theory was supported by many, though mostly after his death, with one of the most noticeable supporters of him being Ticho Brache and Kepler who made model of his theory, as well as improving it.
Answer:
be the mehcanic for once and see what the answer is
Explanation:
Answer: It decreases.
Explanation:
Lever arm is defined as the <em>"perpendicular distance that exists from the rotation axis to the line of action of the force"</em>. Being its magnitude 
related to the application of the force that produces a torque.
To understand it better:
The lever arm is an effective distance to apply a force with respect to a certain point, and this distance serves as an effective applied force amplification factor.
In this sense, Torque 
is defined as:
Where:
is the distance from the applied force to the fulcrum
is the applied force
is the angle between and
It is important to note, is maximum when 
. Then, assuming and remains the same, <u>if decreases decreases, as well.</u>
Hence:
If the angle decreases, the magnitude of the lever arm will decrease.
So, the greater the lever arm, the greater the torque and the lesser the force we have to apply.
