a. The ball's horizontal and vertical positions at time 
are given by
The ball reaches the net when 
:
At this time, the ball is at an altitude of
which is 1.40 m - 0.900 m = 0.500 m above the net.
b. The change in angle gives the ball the new position functions
The ball reaches the net at time such that
at which point the ball's vertical position would be
so that the ball does not clear the net with 0.343 m - 0.900 m = -0.557 m.
By definition, we have that the number of neutrons is given by:
# neutrons = atomic mass - # protons
We know that the atomic mass is equal to 84.
We know the atomic number of Krypton is equal to 36. This means that the Krypton has 36 protons and 36 electrons.
Therefore, substituting values we have:
# neutrons = 84 - 36
# neutrons = 48
Answer:
The Krypton has 48 neutrons
Answer:
A) If you look at the vertical rows you can tell how many electrons there are on the outer shell eg. Group 7 (eg. nitrogen) has 7 electrons on its outer shell
B) They are in the same group
C) Helium,Argon and Organessom are all Nobel gasses
We know that a charge moving in a magnetic field is subject to the force:
F = q · v · B
But we also know that:
F = m · a
Therefore, it must be:
m · a = <span>q · v · B
And solving for a:
</span>a = <span>q · v · B / m
Recall that for a proton:
q = 1.6</span>×10⁻¹⁹ C
m = 1.673×10⁻²⁷ kg
Now, you can find:
a = 1.6×10⁻¹⁹ · 7.0 · 1.7 / <span>1.673×10⁻²⁷
= 1.14</span>×10⁹ m/s²
Hence, the acceleration of the proton is 1.14<span>×10⁹ m/s²</span>.
Yes it would hope i helped !
