Cómo puedo saber si el celular tiene bateria sin encenderlo?
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The air that we breath is made mostly of which gaseous molecule

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.

Another word for electromagnetic energy is a. heat b. force c. matter d. radiation