The horizontal motion has no effect on the vertical drop.
From a drop, the distance the ball falls in 'T' seconds is
D = 4.9 T^2
so
2.2 = 4.9 T^2
T^2 = 2.2/4.9
T^2 = 0.449 sec^2
T = 0.67 second
Answer:
Gravity separation is an industrial method of separating two components, either a suspension, or dry granular mixture where separating the components with gravity is sufficiently practical: i.e. the components of the mixture have different specific materials and Magnetic separations take advantages of natural magnetic properties between minerals in feed. The separation is between economic ore constituents, noneconomic contaminants and gangue. and saw dust can be separated by gravity separation method. The process can be used for separating insoluble substances which are heavier than liquid by allowing them to settle down on their own due to gravity. The mixture of sand and iron can be separated from each other by using a magnet. Iron gets attracted towards a magnet leaving behind the sand.
<h2>
Please mark me as brainliest by clicking on the crown at the bottom of my answer</h2>
What it looks to be that you found in A was the "initial"...b/c the question asks:
<span>"how much energy does the electron have 'initially' in the n=4 excited state?" </span>
<span>"final" would be where it 'finally' ends up at, ie. its last stop...as for this question...the 'ground state' as in its lowest energy level. </span>
The answer comes to: <span>−1.36×10^−19 J</span>
You use the same equation for the second part as for part a.
<span>just have to subract the 2 as in the only diff for part 2 is that you use 1squared rather than 4squared & subract "final -initial" & you should get -2.05*10^-18 as your answer. </span>
Answer:
the time is t = 7.45 s
Explanation:
In this problem we are going to suppose that the star halfback moved in a straight line. From that assumption we can say the following :
''He averaged 9.8 m/s ...'' so the average speed is 9.8 m/s
'' ... for an 80-yard (73 m) score'' so the distance is 73 m
There is an equation that relates average speed,distance and time in
straight line movements with constant acceleration
Average speed = Distance/time replacing the data
9.8 m/s = 73 m/t
t = 73 m/(9.8 m/s)
t = 7.44897 s = 7.45 s
Be aware to having the data in congruent units
For example : average speed (mi/h) ; distance (mi) and time (h)
Answer:
the impulse and change in momentum of the football is 18.83 N/s.
Explanation:
Given;
applied force, F = 420 N
time of force action, t = 22.3 s
The impulse and change in momentum of the football is calculated as;
J = ΔP =
where;
J is the impulse
ΔP is the change in momentum
J = ΔP =
Therefore, the impulse and change in momentum of the football is 18.83 N/s.