Chemistry, 26.08.2019 06:30 zania30

The aurora is caused when electrons and protons, moving in the earth's magnetic field of ≈5×10−5 t, collide with molecules of the atmosphere and cause them to glow. what is the radius of the circular orbit for (a) an electron with speed 1.0×106m/s and (b) a proton with speed 7.0×104m/s. what is re in meters and what is rp in meters?

Answers: 1

Show answers

Answers

Answer from: Rock3422

a) 0.114 meters is the radius of the circular orbit for an electron with given speed.

b) 14.6 meters is the radius of the circular orbit for a proton with given speed.

Explanation:

Force on the charge particle :

F = qvB

Since, the particle is revolving around in a circular path ;

$F'=\frac{mv^2}{r}$

particle in constantly moving in circular path under action of magnetic field:

F = F'

$qvB=\frac{mv^2}{r}$

$r=\frac{mv}{qB}$

Where :

r = radius of the circular path

m = mass of the particle

v = velocity of the particle

B = magnetic field

q = magnitude of charge on the particle

a) Velocity of the electron = $v=1.0\times 10^6 m/s$

Mass of electron = m = $9.11\times 10^{-31} kg$

Charge on an electron , q= $1.602\times 10^{-19} C$

B = $5\times 10^{-5} T$

Radius of the circular orbit for an electron with given speed = r_e

$r_e=\frac{9.11\times 10^{-31} kg\times 1.0\times 10^6 m/s}{1.602\times 10^{-19} C\times 5\times 10^{-5} T}$

r_e = 0.114 m

0.114 meters is the radius of the circular orbit for an electron with given speed.

b) Velocity of the proton = $v=7.0\times 10^4 m/s$

Mass of electron = m = $1.67\times 10^{-27} kg$

Charge on an electron , q= $1.602\times 10^{-19} C$

B = $5\times 10^{-5} T$

Radius of the circular orbit for a proton with given speed = r_p

$r_e=\frac{1.67\times 10^{-27} kg\times 7.0\times 10^4 m/s}{1.602\times 10^{-19} C\times 5\times 10^{-5} T}$

r_p = 14.6 m

14.6 meters is the radius of the circular orbit for a proton with given speed.

Answer from: Quest

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

Another question on Chemistry

Chemistry, 21.06.2019 19:00

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

Answers: 1

Answer

Chemistry, 21.06.2019 22:30

Agas at 155 kpa and standard temperature has an initial volume of 1.00 l. the pressure of the gas rises to 500 kpa as the temperature also rises to 135°c. what is the new volume? 2.16 l 0.463 l 0.207 l 4.82 l

Answers: 3

Answer

Chemistry, 22.06.2019 10:10

When electrolyzing copper (ll) chloride, what reaction takes place at the anode? what reaction takes place at the cathode?

Answers: 1

Answer

Chemistry, 22.06.2019 13:00

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table

Answers: 3

Answer

You know the right answer?

The aurora is caused when electrons and protons, moving in the earth's magnetic field of ≈5×10−5 t,...