Among the fission products that may be extracted chemically from the spent fuel of a nuclear reactor is 90Sr (half-life 29 y). By its radioactivity, this isotope generates thermal energy at a rate of 0.93 W/g. What is the effective energy released per decay associated with the decay of a 90Sr nucleus

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?