A laptop computer adapter has a voltage of 19 V it has a resistance of 4.0 Ω the adapter gets warm when operating determine the current going through the adapter

Ineed the answers for these promblems i have

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius