An electric heater has a resistance of 15 ohms and is connected to a 120 volt circuit. What how many amps are in the circuit?

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false