Which statement about Atomic Number is correct

A: It is the number of protons in the nucleus of an atom

B: It is the number of neutrons in the nucleus of an atom

C: It is the number of electrons in the nucleus of an atom

D: It is the number of electrons and neutrons in the nucleus of an atom

E: It is the number of protons + neutrons in the nucleus of an atom

F: It is the number of protons + electrons in the nucleus of an atom

Someone please help me :(

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

not too sure thinking all accelerations are pointed down

friction

explanation:

they us to move forward and backwards