4. How many forces are acting on a wooden block being pushed horizontally to the right with an increasing speed across the table? Name them and indicate in which direction they act.

Texture and composition are different because they are not the same aspect. texture has to do with feel and so on, where as composition is the chemical makeup which you cant touch like you can texture.

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n

Is there any opitions? if you have the periodic table, the noble gases are 8a family, the halogen are the 7a family, and the nonmetal are  carbon, nitrogen, phosphorus, oxygen, sulfur, selenium, fluorine, chlorine, bromine, iodine and astatine.