3. Una piedra es lanzada hacia arriba desde lo alto de un edificio, a un ángulo de 30° con la horizontal, y con una rapidez inicial de 20 m/s, como se muestra en la figura.
La altura del edificio es de 45 m.

Determina: El tiempo de vuelo y la distancia horizontal
máxima.

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Given the data calculated in parts a, b, c, and d, determine the initial rate for a reaction that starts with 0.85 m of reagent a and 0.70 m of reagents b and c?