46 points and ! brian is riding his skateboard to his friend's house. brian is pushing on the ground with his foot to move himself and the skateboard forward. which energy is transformed into mechanical energy? radiant energy chemical energy sound energy electrical energy

During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.

Can someone me with questions 12 and 13 plz.

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space