Three points affecting are :
a. Magnitude of force.
b. Distance of point of contact.
c. Angle at which force is applied.
We know By Einstein's Photoelectric Equation:
Since 
is plotted along X-axis and 
along Y-axis, it represents a straight line
(i) The slope of 
versus graph= (h/e) i.e it is a constant quantity and does not depend on the nature of the metal surface
(ii) The intercept on the -axis = 
i.e it depends on the work function of the metal surface
<em>Refer to the attachment for the graph</em>
A. 0.5kg
To get this answer you need to follow the equation of KE=0.5*mv^2
But we don't have the m part in the equation. So just plug in the numbers to see which works best, though I can tell you before we do that the answer would be a.
As you may know, gravity, is a force of 9.8 m/s. And we want to get 9.8 Joules. So if we take a half a kg stone, release it at one meter, we get half of the normal gravity pull, 4.90 Joules. That means if we take half a kg stone and drop it at a doubled height, we get 9.8 Joules.
That is also to say that if we have a 1kg stone and drop it at one meter you will get the normal pull of gravity in Joules, 9.8J.
Be careful though, this does not mean if you drop a 1kg stone and a .5 kg stone the 1kg will hit first. This simply means that the 1kg stone will have twice the Joules that the .5kg stone has.
Answer:
maelstrom
Explanation:
A whirlpool like this is called a maelstrom.
Hope this Helps!! Have an Awesome Day!! (-:
