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- Two automobile headlights are connected in series to a 25 Volts battery each having a resistance of 1.0 Ohm and 2 Ohms respectively. What is the current flowing in the circuit? (in ampere)Determine the luminous efficacy of the following lamps having comparable illumination outputs:a. A 300 W incandescent lamp that emits 5820 lmb. Two 32 W linear fluorescent lamps that emit 2950 lm per lamp in a luminaire that consumes 70 W including the ballastsc. A 70 W metal halide lamp that consumes 88 W, including the ballast and emits 5500 lmA portable heater is listed for 115 volts. It uses 12 amperes of current. Whatis the resistance of the heater?
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- Fluid mech 1.A cargo truck having a weight of 4000 lb skids through a distance of 46 m before colliding with a parked Toyota land cruiser having a wight of 2000 lb. After collision both vehicles skid through a distance equal to 10 m before stopping. If the coefficient of friction between tires and pavement is 0.6 m, compute the speed of the truck after collision. 2. A driver of the service car at Solair Casino Hotel is traveling at 55 mph on a wet road. An object is spotted on the road 450 ft. ahead and the driver is able to come to a stop just before hitting the object. Assuming standard perception/reaction time of 2.5 sec and practical stopping distance, determine the grade of the road if the car has a deceleration of 11.2 ft/sec2.Copper tubing 0.500 in. in inside diameter is 11.0 ft long. What is the volume of the refrigerant contained in the tubing10 kg of saturated steam at 800 kPa are heated at constant pressure up to 400°C. The same happens (independently), but with 10 kg of air at 800 kPa, heated at constante pressure up to 400°C. Use the values from any air tables found on the internet. What is the work required, approximately in both cases? Choose the two correct alternatives for this two cases. a) 1150kJ b) 660kJ c) 960kJ d) 115kJ