Engineering Physics II Mock Test 10

1. The first talk about nano-technology was given by ___________

2. A material with one dimension in Nano range and the other two dimensions are large is called ___________

3. The metallic tubes have which kind of structure?

4. Chemical solution deposition is also known as ____________

5. On a 60km track travels the first 30km with a uniform speed of 30km/h. How fast must the train travel the next 30km so as to average 40km.h for the entire trip?

6. Nanoscale aluminium oxide increases the _________

7. Nano crystalline materials synthesised by sol-gel technique results in a foam like structures called ___________

8. In a submarine fitted with SONAR, the time interval between the generation of an ultrasonic wave and the receipt of its echo is 200s. What is the distance of the enemy submarine? The speed of the sound in water is 1.450km/s.

9. The moon is observed from two diametrically opposite points A and B on the earth. The angle θ subtended at the moon by the two directions of observation is 1°54’. Given the diameter of the earth to be 1.276×10⁷ m, compute the distance of the moon from the earth.

10. How many dimensions of the world are there?