1. Avogadro's hypothesis. Avogadro hypothesized that equal volumes of all gases (at the same pressure) will have the same number of molecules. From PV=nRT, we know that one mole of gas takes up 22.4 L
2. Mass number. The mass number is the sum of the protons and neutrons in the nucleus so Carbon 12 has an atomic number of 6 which indicates 6 protons, and a mass number of 12 so 12-6 = 6 neutrons.
3. Avogadro's number. Avogadro's number is the number of units in one mole of any substance, which has been defined as 6.02 x10^23
4. Isotopes are the different forms of a single element. They differ in neutrons. One example is Hydrogen which has three isotopes Protium, Deuterium, and Tritium.
5. Atomic mass. The mass of the atom is equal to the sum of the protons and the neutrons as electrons are so small their mass is negligible. This is not exactly the same as the mass number because this number takes into account the different isotopes
6. mole A mole has the same number of entities as 12 grams of carbon 12, it is expressed by Avogadro's number so 1 mole = 6.02 x10^23 atoms or molecules, etc
7. molar mass- the amount that one mole of substance weighs. For carbon 12, 12 grams has one mole of atoms by definition. So for carbon 12, the molar mass is 12 g/mol
Answer:
Explanation:
a )
from lens makers formula
![\frac{1}{f} =(\mu-1)(\frac{1}{r_1} -\frac{1}{r_2})](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bf%7D%20%3D%28%5Cmu-1%29%28%5Cfrac%7B1%7D%7Br_1%7D%20-%5Cfrac%7B1%7D%7Br_2%7D%29)
f is focal length , r₁ is radius of curvature of one face and r₂ is radius of curvature of second face
putting the values
![\frac{1}{1.8} =(1.38-1)(\frac{1}{.5} -\frac{1}{r_2})](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B1.8%7D%20%3D%281.38-1%29%28%5Cfrac%7B1%7D%7B.5%7D%20-%5Cfrac%7B1%7D%7Br_2%7D%29)
1.462 = 2 - 1 / r₂
1 / r₂ = .538
r₂ = 1.86 cm .
= 18.6 mm .
b )
object distance u = 25 cm
focal length of convex lens f = 1.8 cm
image distance v = ?
lens formula
![\frac{1}{v} - \frac{1}{u} = \frac{1}{f}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bv%7D%20-%20%5Cfrac%7B1%7D%7Bu%7D%20%3D%20%5Cfrac%7B1%7D%7Bf%7D)
![\frac{1}{v} - \frac{1}{-25} = \frac{1}{1.8}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bv%7D%20-%20%5Cfrac%7B1%7D%7B-25%7D%20%3D%20%5Cfrac%7B1%7D%7B1.8%7D)
![\frac{1}{v} = \frac{1}{1.8} -\frac{1}{25}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bv%7D%20%3D%20%5Cfrac%7B1%7D%7B1.8%7D%20-%5Cfrac%7B1%7D%7B25%7D)
.5555 - .04
= .515
v = 1.94 cm
c )
magnification = v / u
= 1.94 / 25
= .0776
size of image = .0776 x size of object
= .0776 x 10 mm
= .776 mm
It will be a real image and it will be inverted.
Answer:
mu=12Tm^2
Explanation:
the magnetic moment mu of a single loop is given by:
![\mu = I A B](https://tex.z-dn.net/?f=%5Cmu%20%3D%20I%20A%20B)
where I is the current, B is the magnetic field and A is the area of the loop. By replacing we obtain:
![\mu=(0.5A)(4m*2m)(3T)=12Tm^2](https://tex.z-dn.net/?f=%5Cmu%3D%280.5A%29%284m%2A2m%29%283T%29%3D12Tm%5E2)
hope this helps!!
<span>There is six horizen.
1. O Horizon - The top, organic layer of soil,
2. A Horizon - The layer called topsoil;
3. E Horizon - This layer is beneath the A Horizon and above the
B Horizon. It is made up mostly of sand.
4. B Horizon - Also called the subsoil - this layer is beneath the E
Horizon and above the C Horizon.
5. C Horizon - it's called regolith: the layer beneath the B Horizon
and above the R Horizon.
6 R Horizon - this is last and the unweathered rock layer that is
beneath all the other layers.</span>
The acceleration of the electron is larger than the acceleration of the proton.
The reason for this is that the mass of the electron is smaller (about 1000 times smaller) than the mass of the proton. The two particles have same charge (e), so they experience the same force under the same electric field E:
However, according to Newton's second law, the force is the product between the mass particle, m, and its acceleration, a:
which can be rewritten as
![a= \frac{F}{m}](https://tex.z-dn.net/?f=a%3D%20%5Cfrac%7BF%7D%7Bm%7D%20)
we said that the force exerted on the two particles, F, is the same, while the mass of the electron is smaller: therefore, from the last formula we see that the acceleration of the electron will be larger than that of the proton.