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A useful figure of merit comparison between batteries that have the same voltage is the ampere-hour (Ah) rating. For example, AA bateries and AAA batteries have the same voltage (1.5V) but AA batteries have a higher Ah rating. Consider a motor scooter battery that is 12 V lead-acid unit with a 9 Ah rating. This means that under certain specified conditions a battery that was initially fully charged can output 1 A at 12 V for 9 hours before it is discharged. a) How much energy is initially stored in the battery if it can deliver 1 A at 12 V for 9 hours? Express answer in Joules b) Suppose the scooter head light is accidentally left on overnight for 8 hours. The light is a 12 W bulb. How much energy if any will be stored in the battery in the morning? Assume that the battery was fully charged before the lights were left on.
approximately how many pounds of downward pressure is placed on a piston in an internal combustion engine at the moment of ignition? I know this will vary some depending on the type fuel, the size of the combustion chamber and ect.
Titanium in the BCC structure has a radius of 0.1423 nm.
Determine the resulting stress equations for σx, σy and τxy given the Airy's stress function ? = a1x^4 + a2(x^3)y + a3(x^2)(y^2) + a4x(y^3) + a5(y^4), where ai are constants. Also determine, if any, the restrictions between constants.
one end of a copper rod 30 cm long is held at 200degc and the other end is held at 93degc. the heat transfer
Determine the resulting change
an automobile having a mass of 2000 kg deflects its suspension springs 0.02 m under static conditions. Determine the natural frecuency of the automobile in the vertical direction by assuming dumping to be negligible.
a speedboat travels at a constant speed of 15 ms while making a turn on a circular curve from a to b. if it takes 45s
Evaluate the valve closure to achieve a water exit velocity
Water flows though a 20mm diameter pipe at 3L/min and static pressure of 100mmHG. What is the wall stress of the pipe. The pipe is 1.5mm thick.
explain the factor, which inhibit the use of a very high resolution and a large number of colors for display in the case of raster scanning display devices.
The angular acceleration of a shaft is defined by the relation a = -0.25w, where a is expressed in rad/s^2 and w in rad/s. Knowing that at t=0 th angular velocity of the shaft is 20 rad/s, determine the time required for the shaft to come to rest.
steam enters the turbine of a rankine cycle at 16 mpa 560oc. the condenser pressure is 8 kpa.nbspthe turbine and pump
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