The radius of the Earth is `6.37xx10^6m` & its mass is `5.975xx10^(24)` kg. Find the Earth's average density to appropriate significant figures.

The radius of earth is 6.37xx10^6 m , its mean density is 5.5 g*cm^(-3) . Calculate the earth's surface potential.

A man is positioned in a circular orbit at a height of 1.6xx10^(5) m above the surface of the earth. The radius of the earth is 6.37xx10^6 m and the mass is 5.98xx10^(24) kg. What would be the orbital speed of the man ? (G=6.67xx10^(-11)N*m^2*kg^(-2))

The radius of the earth is 6.38 xx10^8 cm. its mean density is 5.5 g*cm ^(-3) and the universal gravitational constant is 6.67xx10^(-8) CGS unit. What is the gravitational potential at any point on the earth's surface ?

The mass of an electron is 9.1xx10^-31kg . If its K.E. is 5xx10^-25J . Calculate its wavelength.

If the radius of the earth is 6400 km, g=9.8 m*s^(-2) and G=6.7xx10^(-8) CGS unit, determine the mass of the earth.

The radius of earth is 8xx10^6m and the height of the TV tower is 100m. What will be the maximum range of the signal Transmission?

If the mass of the earth is 6xx10^(27) g and its radius 6400 km, what will be the acceleration due to gravity at a height 64 km above the earth's surface ? Given that G=6.67xx10^(-8) CGS unit.

The average distance of the sun from the earth is 1.5xx10^8 km and the average distance of the moon from the earth is 384000 km. if the attraction of the sun on the earth is 180 times the attraction of the moon ,how many times is the mass of the sun greater than that of the moon ?

The average density of the earth is 5500kg*m^(-3) the gravitational constant is 6.7xx10^(-11)N*m^2*kg^(-2) and the radius of the earth is 6400 km. Using the given values, find the magnitude of the acceleration due to gravity on the surface of the earth.