The root-mean-square value of an alternating current of s0hz frequency is 10 ampere. the time taken by the alternating current in reaching from zero to maximum value and the peak value of current will be (a) 2x10-2 sec and 14.14 amp. (c) 5 x 10-3 sec and 7.07 amp. (b) 1 x 102 sec and 7.07 amp. (d) 5x10 scc and 14.14 amp.

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?