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)

Problem 1: A solid steel shaft 5 m long is stressed at 80 MPa when twisted through 4º. Using G = 83 GPa, compute the shaft diameter. What power can be transmitted by the shaft at 20 Hz? (in Kilowatts)

A 150-mm-diameter jet of water is discharging from a nozzle into the air at a velocity of 45 m/s. Find the power in the jet with respect to a datum at the jet.

Quickly.pls.

A Francis turbine of diameter 3.0 m develops 6750 kW at 300 rpm under a net head of 45 m. A geometrically similar model of scale ratio 1: 8 is to be tested at a head of 9 m. Estimate the size, speed discharge and power developed by the model. What is the specific speed of the model? (Assume overall efficiency of 0.82 for both the prototype and model)

Problem 3 Water (20°C) is pumped through the 300-mm steel pipe from the lower tank to the upper one at a rate of 0.4 m³/s. Given that the pump efficiency is 65% and the pump is on for 5 hours each day, what will be the monthly (30 days) energy cost for the pump if the electricity rate is 0.5 USD per kWh? Assume α = 1.0 throughout. Elevation=235 m 10 m 50 m Elevation 200 m = 300 mm r = 300 mm 100 m

A friend returns to the United States from Europe with a 960-W coffeemaker, designed to operate from a 240-V line. She wants to operate it at the USA-standard 120 V by using a transformer. If the secondary coil has 60 turns, what the number of turns in the primary coil? What current will the coffeemaker craw from the 120V line?

In the mountains, hydroelectric facilities transport water from a reservoir through enclosed tubes to a turbine. In these plants, the intake tube of 100 cm (Point 2), 50 meters in diameter, is under the water surface of the reservoir (Point 1). Before the turbine falls into a 50-cm diameter bucket 200 meters through the tube (Point 3).    (a) What is the speed of the water in the image when the turbine approaches Point 3?(b) Calculate the flow rate of the water at Point 3(c) Calculate the pressure P at point 1 (water surface), point 2 (intake) and Point 3 (nozzle), respectively

1. An unknown lamp placed 6m from a photometer screen provides the same illuminance as a 90 cd lamp placed 4 m from the screen.  What is the candlepower of the unknown lamp? 2. The illuminance of a room 20 ft x 15 ft is being designed.  The illuminance required is 50 footcandles.  What is the total required lumens output of the lamp assuming room and luminaire efficiency of 42%?