Find the order of magnitude of the following quantities: Mass of electron=`9.1 xx 10^31 kg`

Find the order of magnitude of the following quantities: Acceleration due to gravity=9.80665 m//s^2

Find the order of magnitude of the following quantities: Period of rotation of the Earth about its own axis = 24 h = 24 xx 60 xx 60s = 86,400 s.

Find the order of magnitude of the following quantities: Speed of light in vaccum =299792458 m//s

Find the order of magnitude of the following quantities: Universal gravitional constant G=6.673 xx10^-11 N-m^2//kg^2

Round off each of the following quantities to two significant figures : 1.491 xx 10^5 mg

Photoelectric work function of a metal is 3 eV. Find the maximum speed of photoelectrons emitted when radiation of wavelength 4000overset@ A is incident on the metal surface. (Given: mass of electron = 9.1 xx 10^-31 kg )

The work function of a metal is 4.3 eV. Find the K.E. and the velocity of photoelectrons emitted when radiation of wavelength 2500 overset (@)(A) is incident on it. (Mass of electron 9.1 xx 10^-31 kg )

An electron is moving with a speed of 3 xx 10^7m//s in a magnetic field of 6 xx 10^-4 T perpendicular to its path. What will be the radius of the path? What will be the frequency and the energy in keV? Given: mass of electron = 9 xx 10^-31 kg , charge e = 1.6 xx 10^-19C , lev = 1.6 xx 10^-19 J .

Photoelectric work function for a metal surface is 3 eV. Find maximum K.E., maximum speed of photoelectron emitted when radiation of wavelength 4000overset@ A is incident, (mass of electron= 9.1 xx 10^-31 kg ).