A large power reactor that has been in operation for some months is turned off, but residual activity in the core still produces 150 MW of power. If the average energy per decay of the fission products is 1.00 MeV, what is the core activity?
Motion Along a Straight Line Motion is defined in two areas: Dynamics Why the object is moving Kinematics Movement of an object Where there is motion there is velocity (rapidity of motion or operation; swiftness or speed) Velocity: Motion in terms of stopping, speeding up, slowing down, etc. With velocity focus on time (any unit of time) and displacement (distance from “here” to “there”; the object’s change of position) Time: t= t 2 t 1 Velocity: x / t (with x being displacement) The SI units for velocity is meters per second (m/s) Example: Driving from “here” to “there” It takes 1hr to get from “here” to “there”; find the velocity. Displacement: X 2– X 1= 35km – 0km = 35km * 1000m / 1km = 35000m Note: Velocity is in units’ m/s so km needs to be changed to m (there are 1000m in 1km) Time: 1hr * 3600secs / 1hr = 3600secs Note: Velocity is in units’ m/s so mins need to be changed to secs (there are 3600secs in 1hr) Velocity: 35000m / 3600secs = 9.72m/sec Acceleration The change of velocity of an object with respect to time The SI units for acceleration is meters per second squarded m/s 2 Note: Acceleration when gravity is the only force will be constant at 9.8m/s 2 Example: Finding acceleration it takes 2secs to get from “here” to “there” (Vx = Vox + ax*t)(Vox being initial velocity; Vx being final velocity; ax being acceleration; t being time) Acceleration (just plug in #s) Vx