Anselmo vuole sollevare una cassa di 150 kg utilizzando una leva di primo genere costituita da un'asse di legno di massa
trascurabile lunga 3,00 m e appoggiata a un perno.
Sapendo che la massima forza che il braccio di Ansel-
mo può esercitare a un'estremità della leva ha intensi-
tà 350 N e che la cassa è appoggiata all'altra estremità, a
che distanza dalla cassa va posizionato il perno?
b. Se ora Anselmo vuole sollevare una seconda cassa di
massa 250 kg applicando la stessa forza di prima, quanto
varia in percentuale la distanza dalla cassa a cui deve po-
sizionare il perno rispetto al caso precedente?
[57,6 cm; -34,9%

What is the type of the reaction below? bacl2 + h2so4 → 2 hci + baso4 double replacement synthesis single replacement decomposition

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

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