Answer
given,
angle between two polarizing filters = 45°
filter reduce intensity = ?
a) I = I₀ Cos² θ
here θ = 45⁰
intensity of the light is reduced by 0.500
correct answer from the given option D
b) direction of the polarization
θ = 45°
Missing questions: "find the speed of the electron".
Solution:
the magnetic force experienced by a charged particle in a magnetic field is given by
where
q is the particle charge
v its velocity
B the magnitude of the magnetic field
the angle between the directions of v and B.
Re-arranging the formula, we find:
and by substituting the data of the problem (the charge of the electron is
), we find the velocity of the electron:
Answer:
blocks of ice are usually covered with cloth or sawdust while being stored
Answer:
Explanation:
Given mass of grindstone 
radius of stone 
angular speed of disc 
Steel Axle applying a force of 
coefficient of kinetic friction 
Frictional Torque applied by steel is given by
where 
=frictional force
Torque is also given by
where 
=angular acceleration
I=moment of Inertia
Venus goes through phases similar to those of earths moon.
