what have we learned from the work of harlow shapley and others about the location of the sun in the milky way galaxy?

Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane

An object has a weight of 500 on earth what is the mass of this object

Apiece of metal 75g at 110°c is dropped in a container with 500g at 20°c. the h2o if temperature is 24°c find specific heat capacity of metal