What is the force of gravity between the earth and the mass of 1kg placed on its surface? (Mass of earth = 6 x 10^24 kg)

Given that,

Mass, m = 1 kg

Mass of the Earth,

Radius of Earth, r = 6378  km

To find,

The gravitational force.

Solution,

The formula for the gravitational force is given by :

So, the required force is 9.83 N.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.