Your answer is A. If velocity decreases, your kinetic energy would also decrease.
To develop this problem it is necessary to apply the concepts related to Interference and the Two slit experiment.
Young's equation defines the separation between fringes this phenomenon as,

Where,
Wavelength
d = Separation between fringes
a = Slit width
D = Distance between the slits and screen
Then for the two case we have


Calculating the new separation between the fringes would be



We have then,


Therefore the correct answer is c.
Answer:
Part a)
Direction of net force is

Part b)
Direction of the velocity is given as

Explanation:
As we know that the velocity of the particle is given as

now the acceleration is given as


now magnitude of net acceleration is given as




Part a)
Now direction of net force is given as




Part b)
Direction of the velocity is given as




Answer:
0.0031 m
Explanation:
y = Length of pixel = 281 μm
L = Distance to screen = 1.3 m
= Wavelength = 550 nm
d = Pupil diameter
= Angle
We have the expression

We have the expression

The pupil diameter is 0.0031 m
The buoyant force on an object fully submerged in a liquid depends on
the density of the liquid, and the density of the object. But the density
of the object depends on the object's volume and the object's mass.
So the only item on this list that it DOESN't depend on is the mass of
the liquid.
I guess that means that the buoyant force on a fully submerged object is
the same whether it's submerged in a cup of water or the Pacific Ocean.