Answer:
Explanation:
We just have to calculate what angular displacement a ball with an average angular velocity of 290 rev/min experiments in 0.64s. By definition, angular velocity is the angular displacement divided by the time elapsed:
Since and , we can covert:
Where the terms between parenthesis are equal to 1, so they just change the units. Then for our values we have:
Answer:
Explanation:
Consider:
The equation for the Poynting vector is given as:
∴
Answer:
0.5639m
Explanation:
For a young double slit experiment the expression below gives the angular separation for m dark fringe having slit width d and wavelength λ
=sin⁻¹(mλ/d)
mλ /d =y/L
for the first order,
y= mλL/d
For ratio separation y₀/yD=1 and d= 1
y₀/yD= [mλ ₀L₀/d]/[mλD.LD./d]
1=λ ₀L₀/λD.LD.
λD.LD= λ ₀L₀
L₀= λD.LD/ λ ₀..............(1)
Then substitute the given values into (1) we have
L₀=471 *0.497/611
= 0.3831m
Distance by which the screen has to be moved towards the slit is
LD- Lo
0.947-0.3831= 0.5639m
Answer:
The maximum height of the ball will be "16.53 m".
Explanation:
Given that,
As we know,
The initial as well the final height on the ball will be same after it reaches it's maximum height.
then,
⇒
where,
hence,
The max height of the ball will be:
⇒
Answer:
The coefficient of kinetic friction is
Explanation:
Let us call the force of friction, then we know that is what has caused the acceleration :
Now this frictional force relates to the coefficient of kinetic friction by
where is the normal force.
Putting in numbers and solving for we get:
Hence, the coefficient of kinetic friction is 0.07.