Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation: ( )H2O → ( )H2 + ( )O2

Can you think of a way a rock unit with an older fossil could be above a rock until with a younger fossil? describe the scenario.

At what point the certain object feels zero garvitational force between earth and the moon. take the required information from the book.required: distance away from earth or moon

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?