Nope, color change can also occur during a physical change.
Answer: A Neutron.
I know this is correct. Thank's and yw :3
I’m pretty sure
Part 1; C
Part 2; C
Not 100% sure tho :)
The work-energy theorem says that the total work done on the block is equal to the difference of its kinetic energies at points B and A. Then the total work done on the block is

Friction acts on the block to oppose its motion, so it does negative work on the block, -4.5 J.
The only other force acting on the block as it moves is the force <em>P</em>. Let
be the work done by the force <em>P</em>. Then the total work done on the block is

To solve this problem, apply the concepts related to the centripetal acceleration as the equivalent of gravity, and the kinematic equations of linear motion that will relate the speed, the distance traveled and the period of the body to meet the needs given in the problem. Centripetal acceleration is defined as,

Here,
v = Tangential Velocity
r = Radius
If we rearrange the equation to get the velocity we have,

But at this case the centripetal acceleration must be equal to the gravitational at the Earth, then



The perimeter of the cylinder would be given by,



Therefore now related by kinematic equations of linear motion the speed with the distance traveled and the time we will have to




Therefore the period will be 44.9s