Answer:
1.33
Explanation:
Using the formula for destructive interference since the two reflected ray light waves from eyeglass should be made to cancel each other ( destructive interference) and also refractive index of air less than the refractive index of the film and both are less than the refractive index of the glass meaning the both reflected rays from the air and film will experience a phase change
n film = ( m + 0.5) ( λ / 2t)
since 2 t = ( m + 0.5) ( λ / n film)
where m is an integer, λ is wavelength, and t is thickness and n film is the refractive index of film
for effectiveness m = 0
n film = ( 0.5) ( 480 ÷ (2 × 90 ) ) = 1.33
Answer: 1 tablet per day
Explanation:
Given:
Mass of vitamin B2 in the tablet = 3.00mg = 0.003g
Daily requirement = 0.0030g/day
To get proper amount of vitamin ( not too much or too low), the number of tablets to take per day is given as;
N = mass per tablet/daily requirement
N = 0.003g/0.003g/day
N = 1 tablet per day
Therefore, a person should use one tablet per day.
Answer:
Option C.
Explanation:
A scientific theory or simply theory can be defined as an explanation which is well validated of some natural aspects based on factual set proved by repeated experimentation.
The facts when found correct after experimentation and can be unified results in the formation of theory which can further be applied to predict some of the future occurring phenomena or events in the nature or world.
Answer:
range becomes 4 times
Explanation:
We know that the range of a projectile is given as:
where:
range of the projectile
initial velocity of projectile
initial angle of projection form the horizontal
g = acceleration due to gravity
When the initial velocity of launch is doubled:
range becomes 4 times