Answer the following questions using the topographic map 1. what is the elevation at each of the following points for A B C and D?

2. what is the contour interval of this map?

3. calculate the gradient between C and D

4. calculate the gradient between A and B

5. in what direction does fish creek flow?

6. what is the elevation of point X?

7. what side of rock mountain is the steepest?

8. what side of rock mountain has the gentlest slope ?

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

If a simple machine reduces the strength of a force, what must be increased?