Ineed to know the answer with steps for q: 6

Explanation:

There really are no steps. You just have to know the rules.

A

There are 2 digits in 2.5 so there are 2 sig digs.

B

There are 3 digits in 5.32 so there are 3 sig digs

C

Here is your first tricky one. There is either 3 or 4 sig digits. In fact the zero counts: there are digits to the left of the zero. So the zero is one of the sig digs. There are 4.

D

This one is even nastier. there are no none zero numbers to the left of the 0. This zero does not count. There are only 2 sig digs.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.