<u>Answer
</u>
Mechanical energy ⇒ Electric energy
<u>Explanation
</u>
A generator is used to produce electric energy. When he coils are made to rotate/spin, is makes the mechanical part. This coils rotates inside a magnetic fields inducing current in the coils. When current starts flowing in the coils, it forms the electrical part.
So, on the generator the energy changes are from mechanical to electrical energy.
Answer:
a). 
b). 
Explanation:
For the block that stays on the track, its maximal height is attained when all of the kinetic energy is converted to potential energy
a).
The height for the block on the longer track can by find using this equation:

Cancel the mass as a factor in each element in the equation



b).
The other lost some kinetic energy so, use a projectile motion to determine the total height for the other bock:




Solve to v'





Answer:
solid at room temperature
Explanation:
they are unreactive
Momentum = mass x velocity, so 500kg x 2m/s = 1000 kg m/s