What happens when a star like the sun exhausts its core hydrogen supply?

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

What determines the amount of inertia an object has

Which type of reaction is shown in this energy diagram? energy products activation energy reactants time o a. endothermic, because energy is released to the surroundings o b. exothermic, because energy is absorbed from the surroundings o c. exothermic, because energy is released to the surroundings o d. endothermic, because energy is absorbed from the surroundings