It should be true: electrons low from negative toward positive to negative toward positive because opposite charges attract each other.
I hope this was correct
Answer:
Explanation:
wave length of light λ = 623 x 10⁻⁹ m .
Distance of screen D = 76.5 x 10⁻² m
width of slit = d
Distance on the screen between the second order minimum and the central maximum = 2 λ D / d
1.11 x 10⁻² = (2 x 623 x 10⁻⁹ x 76.5 x 10⁻² )/ d
d = ( 2 x 623 x 10⁻⁹ x 76.5 x 10⁻²) / 1.11 x 10⁻²
= 85872.97 x 10⁻⁹
= 85.87297 x 10⁻⁶
= 85.87 μm
width a of the slit is = 85.87 μm
Answer:
A). 1.9 cm
Explanation:
m = Mass of brick = 12 kg
g = Acceleration due to gravity = 9.81 m/s²
r = Radius of hose
A = Area = ![\pi r^2](https://tex.z-dn.net/?f=%5Cpi%20r%5E2)
F = Force = ![mg](https://tex.z-dn.net/?f=mg)
Let us assume that the pressure required to lift the brick would be atmospheric pressure
![P=\dfrac{F}{A}\\\Rightarrow P=\dfrac{F}{\pi r^2}\\\Rightarrow r=\sqrt{\dfrac{F}{\pi P}}\\\Rightarrow r=\sqrt{\dfrac{12\times 9.81}{\pi\times 101325}}\\\Rightarrow r=0.01923\ m=1.9\ cm](https://tex.z-dn.net/?f=P%3D%5Cdfrac%7BF%7D%7BA%7D%5C%5C%5CRightarrow%20P%3D%5Cdfrac%7BF%7D%7B%5Cpi%20r%5E2%7D%5C%5C%5CRightarrow%20r%3D%5Csqrt%7B%5Cdfrac%7BF%7D%7B%5Cpi%20P%7D%7D%5C%5C%5CRightarrow%20r%3D%5Csqrt%7B%5Cdfrac%7B12%5Ctimes%209.81%7D%7B%5Cpi%5Ctimes%20101325%7D%7D%5C%5C%5CRightarrow%20r%3D0.01923%5C%20m%3D1.9%5C%20cm)
The radius of the hose should be 1.9 cm
Because the information cant be out of the investigation
Using the equation for period length for a pendulum, you get 32.829 meters.