How much energy is supplied to a 9 V bulb if it is switched on for 3 minutes and takes a current of 0.2 A ?

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87

Sound is a disturbance that travels through a medium as a

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.