Difference between bouyancy and density

ANSWER GURL

Explanation:

Buoyancy is the upward force that a fluid exerts on an object. Illustrations should use arrows to indicate the upward buoyant force on a floating object. 2. If the density of an object is less than the density of the surrounding fluid, the buoyant force of the liquid will cause the object to float

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.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current