Which of the following is not an example of a chemical reaction? rust, photosynthesis, melting ice, heat from fire?

Aregular polygon has angkes of size 150° each. how many side has the polygon

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?