All the following statements about dc current are true except:
1. flows bidirectionally
2. grabs hold of the recipient making it difficult for them to get away from the shock source
3. dry batteries are one source example
4. is considered as not as dangerous as ac

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

What kind of simple machine is a catapult?

What accounts for an increase in the temperature of a gas that is kept at constant volume? a. energy has been removed as heat from the gas. b. energy has been added as heat to the gas. c. energy has been removed as work done by the gas. d. energy has been added as work done by the gas.