A carpenter constructs a block letter ""L"" using 10 square ceramic tiles. The letter is 7 tiles high and 4 tiles wide as shown in the figure. Find the center of mass of this item relative to the lower left corner O. Express your result in the units of the tile width d =1.

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Atomic nuclei of almost all elements consist of