Two bulbs of 100w are burnt for 4 hours daily and a coffee heater of 750 watt is operated for 20 min. calculate the amount of heat energy consumed and the cost in the moth of February if 1 unit is 2.2 rupees.

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?