What is the role of neutrons in an atom?
a. neutrons provide a negative charge to the atomic nucleus
b. neutrons provide a positive charge to the atomic nucleus
c. neutrons keep protons apart so they don't repel each other
d. neutrons neutralize electrons

Act has a 1200: 5 or 240: 1 turns ratio. it is short circuited. what is the maximum current at 1200a primary if we put a 100ohm resistor across the secondary end of the ct. use it as current source circuit.

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m

What is the measure of a change in an objects velocity?