calculate the amount of thermal energy that is realeased when 20g mass of zinc at 30°C is cooled to 0.0°C the theoretical specific heat capacity of zinc is 0.388J/g°C​

Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air