What is the probable cause of earth magnetism?

What is the cause of refraction?

What is the cause of friction?

Where is the vertical component of earth's magnetic field zero?

What is the cause of Adsorption?

Write the value of earth's magnetic field.

As you have learnt in the text, a geostationary satellite orbits the earth at a height of nearly 36,000 km from the surface of the earth. What is the potential due to earth’s gravity at the site of this satellite? (Take the potential energy at infinity to be zero). Mass of the earth = 6.0 xx 10^24 kg, radius = 6400 km

a die is thrown once. What is the probability of getting an even number

Two dice are thrown simultaneously. What is the probability of getting a doublet.

The dip at a place is (30^0) and If the vertical component of earth's magnetic field at that point is 7.5×10^−5 T. then what will be the total magnetic field of earth at that point.