13. Para sacar un clavo, se coloca un pequeño bloque de madera debajo de un grifo y se aplica una fuerza horizontal P, como se muestra en la figura. Se sabe que l = 8.9 cm y que P = 133.45 N, determina la fuerza vertical ejercida sobre el clavo y la reacción en B.

If you wanted to move an electron from the positive to the negative terminal of the battery, how much work w would you need to do on the electron? enter your answer numerically in joules.

Which of the following best explains what happens when the kinetic energy of particles in a liquid state decreases?

Select the correct answer. which of these actions is an example of chemical weathering? o a. freezing water widens the cracks in rocks. ob. plant roots force their way into cracks in rocks and break them. oc. oxygen in air reacts with iron content in rocks, causing them to change color. od. strong winds peel soft rock away, leaving harder rock behind. reset next