A variable is a letter that stands in for a number and unit... True or False?

Which quantities are scalars? choose all that apply a. distance b. speed c. acceleration d. velocity

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

An electric clothes dryer has a resistance of 8 ohms. it draws 30 a of current. what is the voltage, in volts, of the wall outlet that it is plugged into?