As the surface given is a smooth surface, we can use specular reflection. According to the law of specular reflection, the angle of incidence equals the angle of reflection, so it will also be 40°. Answer is A.
Answer:
A. True
Explanation:
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior.
Brainlist Pls!
Answer:
The velocity of the observer is 6.8 m/s
Explanation:
Doppler effect equation is given by the formula:
The velocity of the observer is 6.8 m/s
Answer:
2630250 N/C, horizontally left
0

1434.825 N/C, horizontally left
Explanation:
m = Mass of particle
u = Initial velocity = 
v = Final velocity = 0
t = Time taken
s = Displacement = 3.5 cm
q = Charge of particle = 
Force is given by

Acceleration is given by


Magnitude of electric field is 2630250 N/C
Direction is horizontally to the left
The angle counterclockwise from left is zero.


The time taken is 
Acceleration is given by


Magnitude of electric field is 1434.825 N/C
Direction is horizontally to the left