Answer:
The correct statements are D and E.
Explanation:
The fringe width is given by the following formula as :
Here,
is wavelength of light
D is distance between slit and the screen
d is slit width.
If the between these slits is decreased, the fringe width increases. As a result, the distance between the minima increases and also the distance between the maxima increases.
Explanation:
please help
I need 100$ USD Dollars for buying arduino kit the proof is in the photo.
Answer:
the helium nucleus’s final speed =
Explanation:
From the question; we are to calculate just only the helium nucleus’s final speed, in meters per second.
From the knowledge of Kinetic energy;
Kinetic energy K.E =
Making the velocity the subject of the formula from the above expression; we have:
where;
K.E = 8.00 × 10⁻¹³ J
m₁ = 6.68 × 10⁻²⁷ kg
Answer:
96.5 km/h
Explanation:
The average velocity of the train is given by:
where
d is the displacement
t is the time taken
For this train, we have:
d = 55 km south (displacement is a vector, so we must also consider the direction)
Substituting into the equation, we find the average velocity:
Answer:
twice the original speed
Explanation:
the centripetal force is the force of an object moving in a circle of turning and it is given by the expression
where f = force of the object
m = mass
v = velocity
r = radius of the circle
first we need to know what the orignal speed will be then we can tell what will happen if the radius of the circle is changed to 4R.
from the expression for the centripetal force, we need to make the velocity subject of the formula
now, if the radius is changed to 4R
in the expression for v above i will need to just insert 4R in place of r
the square root of 4 is 2,
therefore
we can see that this is just twice of what the original speed was.