Is there any difference between antimatter, dark matter, dark energy, and degenerate matter?

The velocity of a curling stone is due east. what will be the direction of the momentum of the curling stone as it moves?

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=

Examples of states of consciousness include a. daydreaming b. dreaming during sleep c. hypnosis d. all of the above