Answer:
A chemical change produces a new substance, while a physical change does not
Longitud wave something like that.
D 193 is the right answer if not try c because it is in between them both
Answer:
The acceleration is 
Explanation:
From the question we are told that
The radius is 
The magnitude of the magnetic field is 
The rate at which it decreases is 
The distance from the center of field is 
According to Faraday's law

and 
Where the magnetic flux 
E is the electric field
dl is a unit length
So


Now
is the circumference of the circular loop formed by the magnetic field and it mathematically represented as 
A is the area of the circular loop formed by the magnetic field and it mathematically represented as 
So

Substituting values


The negative signify the negative which is counterclockwise
The force acting on the proton is mathematically represented as

Also 
So
Where m is the mass of the the proton which has a value of 

So


Answer:
A. It has mostly kinetic energy
Explanation:
Kinetic energy refers to movement. Potential energy refers to height. In this case, the big drop just got over. So, when the coaster is at the bottom, it has more kinetic than potential energy . Potential energy is still present but kinetic is more at the bottom.