An objects speed is the distance it travles DIVIDED by the amount of time it takes
Answer:
y and length is directly relation
Explanation:
Given data
A single-slit diffraction pattern is formed on a distant scree
angles involved = small
to find out
what factor will the width of the central bright spot on the screen change
solution
we know that for single slit screen formula is
mass ƛ /area = sin θ and y/L = sinθ
so we can say mass ƛ /area = y/L
and y = mass length ƛ / area .................1
in equation 1 here we can see y and length is directly relation so we can say from equation 1 that the width of the central bright spot on the screen change if the distance from the slit to the screen is doubled
<span>b. the reason we must wear seat belts </span>
Answer:
Explanation:
For this particular problem, we are going to use the non-relativistic Doppler effect which, is the change in frequency of a wave concerning an observer who's moving relative to the wave source. The shifted wavelength is:
,
where 
is the wavelenght as it comes from the source, 
is the velocity of the source (the quasar) and, 
is the velocity of the wave. In this case, the velocity of the wave is the speed of light, 
.
Solving for ,
,
now computing
,
The velocity of the quasar is negative because it is getting close to the Earth!
