The roller pushes the private boat for 2.3 s during this time 190000j of energy is supplied to the motor calculate the power supplied to the elsevttcal power

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?

Five structural isomers have the formula c6h14. where needed, draw the structure and give the iupac name of all five isomers.

The chemical formula for carbonic acid, a compound used in carbonated drinks, is h2co3. assume that these symbols represent the three elements of this compound: