Hey there!

: Scientific law's would be a law that was proven and test and examined by scientist.These laws would basically be fact's, proven that what ever they say would technically be true.

: These are "theories" that are made by scientist usually hypothesis to see what law would actually be true. These "theories" are of course not true, they are not quite laws, they are experiment's that could be laws, but they're theories, thing's that are technically false.
Hope this helps you!
Answer:
1. at the top of the coaster.
2. at the bottom of the coaster.
3. when the car is moving
4. when the car is moving
Explanation:
there is the most amount if potential energy at the top, and the keast at the bottom.
Answer: a. the magnetic field surrounding a long, straight wire
Explanation:
The Biot-Savart law was formulated by Jean Baptiste Biot and Felix Savart and describes how a magnetic field is generated by a stationary electric current.
In other words:
The law formulated by Biot and Savart relates the magnetic fields with the currents that create them.
Therefore, the correct option is a.
The magnetic field surrounding a long, straight wire.
Answer is: 1973.17N aprox.
step by step in the pic below