Hello there.
Question: <span>The mechanical advantage of a fixed pulley is always _________________.
Answer: It is one.
Hope This Helps You!
Good Luck Studying ^-^</span>
Answer:
W=
Explanation:
a) Yes, In the absence of external torques acting on the system, the angular momentum is conserved.
b) By the law of conservation of energy angular momentum
c) work done in pulling the chord W= Final kinetic energy(K_2)-Initial Kinetic energy(K_1)
Now,
J
Therefore, Work done W=
Ok here's something i know. <span>Metals are good conductors of electricity because the electrons are free to move in a network of metal atom. So because of the "Sea of Electrons", these electrons do not belong to just one atom but move freely about the metal's network which makes them great conductors of heat and electricity. Also, because they contain many orbitals separated by extremely small energy differences, and metals can absorb a wide range of light frequencies too.</span>