When using the mathematical ratio method for determining the
order of each reactant in an experiment, how do you determine which
data pounts to use in the ratio?
Derive the formula for electron charge to mass
ratio
e/m=2V/(Br)^2: first, explain why formulas
(mv^2)/r=evB and
eV=1/2mv^2 must hold. Then, do what algebra is necessary
to show that those formulas imply formula
e/m=2V/(Br)^2
3.a) How to use the Thomson`s experiment to determine the
electron charge?
. b). Plan and describe the experiment based on the Hall effect
in order to determine the concentration of electrons in a metal
sample (use slide 19).
In detail, explain what role magnetism play in the 'Charge to
Mass ratio of an electron' experiment performed by J.J.
Thomson?
How can magnetism alter the expected results?
Why is it important for the electron beam to be perpendicular to
all non-negligible magnetic fields?
A proton (charge +e = 1.61x10-19 C and mass m =
1.67x10-27 kg), traveling perpendicular to a magnetic
field, experiences the same force as an alpha particle (charge +2e
and mass 4m) which is also traveling perpendicular to the same
field. The ratio of their speeds,
valpha/vproton, is:
A. 0.5
B. 1
C. 2
D. 4
E. 8
In the Dumas Method for determining the molar mass of an unknown
liquid with a boiling point less than water, the liquid is
vaporized in a bulb (whose volume is precisely known) that is
immerse in a water bath. The bulb is sealed after all the liquid
has been evaporated. The bulb is cooled and the gas that has filled
the container condenses. The bulb is weighed and the weight of the
liquid in the bulb is determined by weighing...