Select the correct answer. which scientist performed the cathode ray experiment leading to the discovery of electrons? a. dalton b. rutherford c. democritus d. bohr e. thomson

Can someone me with questions 12 and 13 plz.

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.