What is the value of `B` that can be set up at the equator to permit a proton of speed `10^7m//s` to circulate around the earth?
`[R=6.4xx10^6m,m_p=1.67xx10^-27kg]`

Calculate the ratio of velocities of a moving electron to that of a proton associated with the same de Broglie wavelength. [m_(e)=9.11xx10^(-31)kg,m_(p)=1.67xx10^(-27)kg,h=6.626xx10^(-34)J*s ]

Calculate the de Broglie wavelength of proton, if its speed is 10^7 cm//s . Given: mass of proton = 1.67 xx 10^-27 kg .

A proton moves with speed (c )/(10) .Its de-Broglie wavelength will be…… (h=6.63xx10^(-34)Js,m_(p)=1.673xx10^(-27)Kg)

The critical speed of a satellite orbiting very close to the surface of the earth is [g=10 m//s^(2) and R=6.4xx10^(-6)m]

What is magnitude of gravitational force between the earth and a 1 kg object on its surface ? Take mass of earth to be 6 xx 10^24 kg and radius of the earth is 6.4 xx 10^6 m.G =6.67 xx10^-11nm^2kg^-2 .

Determine the value of the escape velocity from the surface of the moon. The radius of the moon= 1.7xx10^6m and its mass = 7.35xx10^(22)kg. (G=6.67xx10^(-11)N*m^2*kg^(-2))