William is walking straight across a field towards a vertical flagpole .He observes that when he is at point A ,the angle of elevation of T, the top of the flagpole is 30degrees and when he is at point B, on the same side of the flagpole as A, the angle of elevation of T is 45degrees .The distance between A and Bis 20 metres . Using a scale of 1cm to represent 4m ,construct a single diagram to show the relative positions of A, B and T .b. Using a suitable construction on the same diagram, find the height of the flagpole

Which wave is the result of amplification and produces a louder sound

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?

Metals are good conductors of electricity because they