Answer:27 km per hour West + 17 km per hour North
They tend to be lustrous, ductile, malleable, and good conductors of electricity, while nonmetals are generally brittle (for solid nonmetals), lack lustre, and are insulators. Use google.
Answer:
-2
Explanation:
Since its a compound, it's charge is 0.
So, there are 2 Fe and 3 Oxygen,
let x = oxidation number of oxygen
2(+3) + 3x =0
x =-2
Side note : even if the oxidation number is positive, make sure to put the positive sign like how you would in numbers
Volumetric mass or density
Answer:
Distance between two concentric circles is in radius d = 1.0 um
Explanation:
Given:
- Wavelength of light λ = 680 nm
- Distance of disc from screen x = 1.5 m
- Separation between central and first order y = 1.4 m
- Angle Q is between central order and mth order
Find:
What is the distance between the circles on the CD’s surface? - d?
Solution:
- The relationship between and wavelength and the position of fringes with respect to diffraction grating is given by Youns's experiment as follows:
sin (Q) = m*λ / d
- Compute the angle Q for first order m = 1:
sin(Q) = 1.4 / sqrt(1.4^2 + 1.5^2)
sin(Q) = 1.4 / 2.05183
sin(Q) = 0.68232
- Use the above result and compute for the grating d for m =1 :
d = λ / sin(Q)
d = 680*10^-9 / 0.68232
d = 1.0 um
- Since the circles are concentric the difference in radius is d = 1.0 um
