earths mass is 5.98x10^24 kg. if a 100 kg person is standing on the surface of the earth (d=6,470,000 m), what is the force of gravity between earth and the person?

The image below shows numerous volcanic mountains in the pacific northwest. what is the most likely cause of the volcanic and earthquake activity in this region?

What happens to the vapor pressure of a substance when its surface area is increased at constant temperature?

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?