Design activities to teach sources of energy to elementary school class

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=

Which of the following is not a physical property of mattera. melting pointb. heat of combustionc. viscosityd. boiling point