Answer:
2.316e-3 and 3.47e-3
Explanation:
Now, at that angle, we look at the bright spots on the screen.
tan θ = x / L (x is the horizontal distance from the centre of the screen, L is distance to screen)
For small angles, we can approximate that tan θ = sin θ.
nλ / d = x / L so then
x = n λ L / d
First bright fringe, n = 1
x = (1) (641*10^-9 m) (3.65 m) / (1.01*10^-3 m) = 2.316e-3
For destructive interference (dark fringes), equation becomes:
x = (n - 0.5) λ L / d
Second dark fringe, n = 1.5
x = 1.5 (641*10^-9 m) (3.65 m) / (1.01*10^-3 m) = 3.47e-3
Answer:
The situation is not shown, however if one calculates torques about the pivot point, then the pivot point itself exerts no torque because the force applied by the pivot point exerts zero torque because Fp * L = 0 where L = 0 in this case.
If one wants to calculate torques about, say, the end of the ruler then one would need to calculate the torque applied by the pivot point.
Abiotic is anything that is not alive (i.e. Rock)
Biotic is anything that is alive (I.e. Sunflower)
-- radio and TV
-- GPS
-- garage-door openers
-- cellular phones with mobile data
-- microwave ovens
-- "ham" radio
-- RADAR
-- tanning bed
-- CB radio
-- infrared lamp to keep food warm in a restaurant
-- CAT scan
-- MRI
-- dental X-ray
-- street lights
-- Air Traffic Control
-- CD and DVD players (laser)
-- cameras
Oh. I just read the question again, and I noticed that
you want explanations too. There are 17 examples
on my list, and that would take so much explaining
that I'm going to try and get away without it. I just
hope that the list itself is worth 5 points.
