a certain ac signal at 1000 Hz is applied across an inductor and a 100 ohm resistor. if the power factor of the circuit is 0.400 ; what's the impedance of this circuit?​

Your 249 ml cup of coffee is too hot to drink when served at 82 degree celsius. what is the mass of an ice cube taken from a -21 degree celsius freezer, that will cool your coffee to a pleasant 54 degree celsius. specific heat of the water is 4190 j/kg c, specific heat of ice is 2090 j/kg c, heat of fusion of ice is 3.33 x 10^5 j/kg

An uplifted block of rock between two normal faults

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?