When determining whether a chemical reaction has taken place, you observe and look for several indicators. which would be considered an indication that a chemical reaction or chemical change has taken place?
a) solid melts.
b) heat is given off.
c) substance dissolves
d) substance changes shape.

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.