Help—Cecilia wants to measure the thickness of a piece of cardboard. She stacked 10 identical cardboard pieces and used a ruler to measure the thickness of the stack as shown in the figure.

Which of these is the most accurate thickness of a single piece of cardboard?
0.25 cm
0.5 cm
2.5 cm
5 cm

Which process transfers heat from inside earth to its surface? convection currents in mantle pulling away of tectonic plates drawing in of tectonic plates convection currents in crust

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it