Un cuerpo es lanzando verticalmente hacía arriba con una velocidad inicial de 30 m/s donde se desprecia la resistencia del aire ¿Cuál será la velocidad del cuerpo 2 segundos después de su lanzamiento?

¿Cuánto tarda el cuerpo en llegar al punto más alto de su trayectoria?

¿Cuál es la altura máxima alcanzada por el cuerpo?

AYUDA: por favor​

You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer