The picture is Nathan's model of a cell, the basic building block for living things. What can Nathan NOT demonstrate using this model?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Use the de broglie's wave equation to find the wavelength of an electron moving at 7.3 × 106 m/s. show your work. note: h = plank's constant (6.62607 x 10-34 j s)

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction