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%

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain

Utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must available hint(s)utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must pump water back into their cells to counter its loss due to osmosisactively pump water back out of their cells to counter its inflow due to osmosissynthesize membranes that are impermeable to substances that upset osmotic balanceactively pump salt back out of their cells to counter its inflow due to osmosis

Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.