Answer is B.
Because velocity is vector quantity, so magnitud and direction are needed to define it.
Since velocity means the speed(magnitude) of some object in a given direction, so it’s units are usually measured by meters/ seconds
Answer:
100 newton
Explanation:
newton third law of motion says to every action there is an always an equal and opposite reaction so the magnitude will stay equal but opposite direction
Answer:
0.541 nm
Explanation:
The condition for maxima is,

Here, m=0,1,2,.....
And d is the slit separation, m is the order of maxima,
is the wavelength.
Given that, the 17.3 eV electron posses a wavelength of

And the order of maxima is
.
And the angle at which first order maxima occur is,
.
Put these values in maxima condition while solving for d.

Therefore, the slit separation is 0.541 nm.