Which action can be explain by physics?

a- the growth of fungus on a piece of bread

b- the mixing of sodium and chlorine to form common salt

c- the interactions between predators and prey in an system

d- the pressure of blood exerted on the inner walls of the vein

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Asmall electric heater, immersed in 80g of water in a calorimeter of 40j/k raises the temperature from 10.5 degree celsius to 25 degree celsius in 12 minutes. using the same apparatus with 50g of oil instead of water, it is found that the temperature of oil rises from 7 degree celsius to 27 degree celsius in 10 minutes. find specific heat capacity of the oil.

which statements describe the image? check all that apply.the wood is releasing argon gas.this information is useful for dating ancient rock.the process works only with organic matter.the element has a half-life of 5,730 years.this shows the half-life of carbon-19.