Answer:
Each atom acts as a tiny magnet, when the magnetic field of each of the tiny magnets are aligned together, it gives a north pole and south pole. This is brought about due to prolonged exposure to a permanent magnet, which has caused the alignment of the atoms' individual magnetic fields to attain polarity. If the paperclip is made of iron, it can be magnetized and demagnetized easily. Once the paperclip is removed from the magnet, it will lose its magnetic properties.
Kinetic energy is movement so A
Potential is still so false
A quick, easy way to decide whether there was a chemical change
is to look and see whether there are NEW substances after the
event, that weren't there when it started.
This particular scenario started out with fat and sodium hydroxide (lye).
And then, suddenly, POOF ! Soap and glycerin showed up. Where did
THOSE come from ? They came from the molecules in fat and lye,
getting broken up and recombined to make different substances.
THAT's exactly a chemical change.
Answer:
true
Explanation:
Series resistors are additive
r1 + r2 + r3 = r total the total will always be greater than any one of the parts
Answer:
Initial velocity, U = 28.73m/s
Explanation:
Given the following data;
Final velocity, V = 35m/s
Acceleration, a = 5m/s²
Distance, S = 40m
To find the initial velocity (U), we would use the third equation of motion.
V² = U² + 2aS
Where;
V represents the final velocity measured in meter per seconds.
U represents the initial velocity measured in meter per seconds.
a represents acceleration measured in meters per seconds square.
S represents the displacement measured in meters.
Substituting into the equation, we have;
35² = U + 2*5*40
1225 = U² + 400
U² = 1225 - 400
U² = 825
Taking the square root of both sides, we have;
Initial velocity, U = 28.73m/s
