I think it is c I'm only in 7th grade but I'm pretty sure that the answer is c
Answer: A
Explanation:
Isotopes of different elements differ by the number of neutrons inside the nucleus.
Don't listen to the other guy I just took the test and got it wrong because of him..
I re-took it and the correct answer is
A) Safety Data Sheets (SDS)
The answer is either C or D..
Answer:
a)
m/s
b)
Angular frequency = 
Explanation:
As we know

q is the charge on the electron =
C
B is the magnetic field in Tesla =
T
r is the radius of the circle =
m
mass of the electrons =
Kg
a)
Substituting the given values in above equation, we get -
m/s
b)
Angular frequency =
