Answer: 4 moles of
Explanation: The given compound is an ionic compound formed by combination of sodium as a metal and sulphite as polyatomic anion.
It is formed by the combination of and .
Thus 1 mole of contains 2 atoms of sodium, 1 atom of sulphur and 3 atoms of oxygen.
The 4 represents that 4 moles of are present which contains 8 atoms of sodium, 4 atom of sulphur and 12 atoms of oxygen.
Answer: Microwaves.
Explanation: First, we have a trivial answer, and that is the visible light, which is responsible to let the information on the tv to be seen by the user.
Now, TV technology was possible thanks to the microwaves, that are used because these can carry more energy than other types, and these microwaves needed a special technology because they couldn't be handled by the current technology at the time.
Answer:
The acceleration increases because the mass decreases.
Explanation:
From Newton's second law, force equals mass times acceleration.
F = ma
Solving for acceleration:
a = F / m
F is constant. As the fuel runs out, m decreases. Therefore, a increases.
A=F/m
=5/12
=0.42 m/s^2
Since the ball stops, it decelerates at a rate of 0.42 m/s^2 before stopping and it’s final velocity is 0 m/s.
t=(u-v)/a
=(20-0)/0.42
=48 s