Astring vibrates at a frequency of 28 hz. what is it’s period

Which transition by an electron will release the greatest amount of energy? oa ob oc od

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

When solid surfaces slide over each other the kind of friction that occurs is called friction