Answer:
51.54 m/s
Explanation:
Applying,
Law of conservation of momentum,
Total momentum before collision = Total momentum after collision
mu+m'u' = mv+m'v'.................... Equation 1
Where m = mass of the head of the golf club, m' = mass of the gulf ball, u = initial velocity of the head of the gulf club, u' = initial velocity of the gulf ball, v = final velocity of the head of a gulf club, v' = final velocity of the gulf ball
From the question,
Given: m = 151 g = 0.151 kg, u = 43.9 m/s, m' = 46 g = 0.046 kg, u' = 0 m/s (at rest), v = 28.2 m/s
Substitute these values into equation 1
0.151(43.9)+0.046(0) = 0.151(28.2)+0.046(v')
solve for v'
6.6289+0 = 4.2582+0.046v'
0.046v' = 6.6289-4.2582
0.046v' = 2.3707
v' = 2.3707/0.046
v' = 51.54 m/s
Answer:
B
Explanation:
I'm learning about this now actually and it can be a little confusing but it would be endothermic or exothermic. if endothermic the products have less energy than the reactants and if exothermic products have more energy than reactants
Answer:
8 electrons
Explanation:
to solve this problem it is necesarry to take into account the nume of the other quantum number l, ml, and ms:
l: angular quantum number = l=n-1
ml: magnetic quantum number = ml=-l,...,0,...,+l
It is also neccesary to take into account each n state.
for n=1
- l=1-1=0
- ml=0
each ml state has two electrons with antiparallel spins. Hence, for n=1 you have 2 electron.
forn n=2
- l=2-1=1
- ml=-1,0,1
each ml state has two electrons. hence, for n=2 you have 3*2=6 electrons.
Finally, the total of electrons is 6+2=8
Answer:
122.36
Explanation:
The distance (d) between Charge 1 and 2 can be calculated as:
The force between them is given as
The angle of this force with positive x-axis is given as
Now,
The force between 1 and 3 is
As the force is attractive it is along negative x direction so the angle will be given as =
So the negative x component of the resultant force will be calculated as
=
And the positive y component =
So the angle of the resultant with positive x axis will be