1. True or False: When two batteries are wired in Series the Volts go up and the Amp Hours stay the same. 2. True or False: When to batteries are wired in Parallel the Amp Hours go up and the voltage stays the same. 3. True or False: Voltage is the power of the battery 4. True or False: Amp Hours is how long the power will last 5. True or False: Two 12V Batteries wired together in Series will give you 24 volts of power. 6. True or False: Two 12V Batteries wired together in Parallel will give you 24 Volts of power.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

The higher the astm grain size number, the finer the gran is. a)-true b)-false

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.